• Composer Antonio Diabelli, 1781
• Composer Ludwig van Beethoven, 1770

Diabelli was born in Mattsee near Salzburg. A musical child, he sang in the boys' choir at the Salzburg Cathedral where he is believed to have taken music lessons with Michael Haydn. By age 19, Diabelli had already composed several important compositions, including six masses.

Diabelli was trained to enter the priesthood and in 1800 he joined the monastery at Raitenhaslach, Bavaria. He remained there until 1803 when Bavaria closed all its monasteries.

In 1803 Diabelli moved to Vienna and began teaching piano and guitar and found work as a proofreader for a music publisher. During this period he learned the music publishing business while continuing to compose. In 1809 he composed his comic opera, Adam in der Klemme. In 1817 he started a music publishing business and 1818, partnered with Pietro Cappi to create the music publishing firm of Cappi & Diabelli.

The firm, Cappi & Diabelli became well known by arranging popular pieces so they could be played by amateurs at home. A master of promotion, Diabelli selected widely accessible music such as famous opera tune arrangements, dance music, or hundreds of the latest popular comic theater songs

The firm soon established a reputation in more serious music circles by championing the works of Franz Schubert. It was Diabelli who first recognized the composer's potential, become the very first to publish Schubert's work with Der Erlkönig in 1821. Diabelli's firm continued to publish Schubert's work until 1823 when an argument between Cappi and Schubert terminated their business. The following year, Diabelli and Cappi parted ways, with Diabelli launching a new publishing house, Diabelli & Co, in 1824.

Following Schubert's early death in 1828, Diabelli purchased a large portion of the composer's massive musical estate from Schubert's brother Ferdinand. As Schubert's total compositions number nearly 1000, Diabelli's firm was able to publish "new" Schubert works for more than 30 years after the composer's death.

Diabelli's publishing house expanded throughout his life, before he retired in 1851, leaving it under the control of Carl Anton Spina. When Diabelli died in 1858, Spina continued to run the firm, and published much music by Johann Strauss II and Josef Strauss. In 1872, the firm was taken over by Friedrich Schreiber, and in 1876 it merged with the firm of August Cranz, who bought the company in 1879 and ran it under his name.

He died in Vienna at the age of 76.

Diabelli produced a number of works as a composer, including an operetta called Adam in der Klemme, several masses and songs and numerous piano and classical guitar pieces. Among these are pieces for piano four hands that are popular among amateur pianists.

Diabelli's composition Pleasures of Youth: Six Sonatinas is a collection of six sonatinas depicting a struggle between unknown opposing forces. This is suggested by the sharp and frequent change in dynamics from forte to piano. When forte is indicated, the pianist is meant to evoke a sense of wickedness, thus depicting the antagonist. In contrast, the markings of piano represent the protagonist with its softer, more tranquil tones.

The composition for which Diabelli is now best known was actually written as part of an adventuring story. In 1819, as a promotional idea, he decided to try to publish a volume of variations on a "patriotic" waltz he had penned expressly for this purpose, with one variation by every important Austrian composer living at the time, as well as several significant non - Austrians. The combined contributions would be published in an anthology called Vaterländischer Künstlerverein. Fifty - one composers responded with pieces, including Beethoven, Schubert, Carl Czerny, Johann Nepomuk Hummel, Ignaz Moscheles, and the eight year old Franz Liszt (although it seems Liszt was not invited personally, but his teacher Czerny arranged for him to be involved). Czerny was also enlisted to write a coda. Beethoven, however, instead of providing just one variation, provided 33, and his formed Part I of Vaterländischer Künstlerverein. They constitute what is generally regarded as one of the greatest of Beethoven's piano pieces and as the greatest set of variations of their time, and are generally known simply as the Diabelli Variations, Op. 120. The other 50 variations were published as Part II of Vaterländischer Künstlerverein.

A sonatina of Diabelli's, presumably Sonatina in F major, Op. 168, No. 1 (I: Moderato cantabile), provides the title and a motif for the French novella Moderato Cantabile by Marguerite Duras.

Ludwig van Beethoven (baptized 17 December 1770 – 26 March 1827) was a German composer and pianist. A crucial figure in the transition between the Classical and Romantic eras in Western art music, he remains one of the most famous and influential of all composers.

Born in Bonn, then the capital of the Electorate of Cologne and part of the Holy Roman Empire, Beethoven moved to Vienna in his early 20s, studying with Joseph Haydn and quickly gaining a reputation as a virtuoso pianist. His hearing began to deteriorate in his late twenties, yet he continued to compose, conduct, and perform, even after becoming completely deaf.

Beethoven was the grandson of a musician of Flemish origin named Lodewijk van Beethoven (1712 – 73) (Ludwig is the German cognate of Dutch Lodewijk) who was employed as a bass singer at the court of the Elector of Cologne, rising to become Kapellmeister (music director). Lodewijk had one son, Johann van Beethoven (1740 – 1792), who worked as a tenor in the same musical establishment, also giving lessons on piano and violin to supplement his income. Johann married Maria Magdalena Keverich in 1767; she was the daughter of Johann Heinrich Keverich, who had been the head chef at the court of the Archbishopric of Trier.

Beethoven was born of this marriage in Bonn. There is no authentic record of the date of his birth; however, the registry of his baptism, in a Roman Catholic service at the Parish of St. Regius on 17 December 1770, survives. As children of that era were traditionally baptized the day after birth in the Catholic Rhine country, and it is known that Beethoven's family and his teacher Johann Albrechtsberger celebrated his birthday on 16 December, most scholars accept 16 December 1770 as Beethoven's date of birth. Of the seven children born to Johann van Beethoven, only Ludwig, the second born, and two younger brothers survived infancy. Caspar Anton Carl was born on 8 April 1774, and Nikolaus Johann, the youngest, was born on 2 October 1776.

Beethoven's first music teacher was his father. Although tradition has it that Johann van Beethoven was a harsh instructor, and that the child Beethoven, "made to stand at the keyboard, was often in tears," the Grove Dictionary of Music and Musicians claimed that no solid documentation supported this, and asserted that "speculation and myth - making have both been productive." Beethoven had other local teachers: the court organist Gilles van den Eeden (d. 1782), Tobias Friedrich Pfeiffer (a family friend, who taught Beethoven the piano), and Franz Rovantini (a relative, who instructed him in playing the violin and viola). Beethoven's musical talent was obvious at a young age. Johann, aware of Leopold Mozart's successes in this area (with son Wolfgang and daughter Nannerl), attempted to exploit his son as a child prodigy, claiming that Beethoven was six (he was seven) on the posters for Beethoven's first public performance in March 1778.

Some time after 1779, Beethoven began his studies with his most important teacher in Bonn, Christian Gottlob Neefe, who was appointed the Court's Organist in that year. Neefe taught Beethoven composition, and by March 1783 had helped him write his first published composition: a set of keyboard variations (WoO 63). Beethoven soon began working with Neefe as assistant organist, at first unpaid (1781), and then as a paid employee (1784) of the court chapel conducted by the Kapellmeister Andrea Luchesi. His first three piano sonatas, named "Kurfürst" ("Elector") for their dedication to the Elector Maximilian Frederick (1708 – 1784), were published in 1783. Maximilian Frederick noticed Beethoven's talent early, and subsidized and encouraged the young man's musical studies.

Maximilian Frederick's successor as the Elector of Bonn was Maximilian Franz, the youngest son of Empress Maria Theresa of Austria, and he brought notable changes to Bonn. Echoing changes made in Vienna by his brother Joseph, he introduced reforms based on Enlightenment philosophy, with increased support for education and the arts. The teenage Beethoven was almost certainly influenced by these changes. He may also have been influenced at this time by ideas prominent in freemasonry, as Neefe and others around Beethoven were members of the local chapter of the Order of the Illuminati.

In March 1787 Beethoven traveled to Vienna (possibly at another's expense) for the first time, apparently in the hope of studying with Mozart. The details of their relationship are uncertain, including whether or not they actually met. After just two weeks Beethoven learned that his mother was severely ill, and returned home. His mother died shortly thereafter, and the father lapsed deeper into alcoholism. As a result, Beethoven became responsible for the care of his two younger brothers, and he spent the next five years in Bonn.

Beethoven was introduced to several people who became important in his life in these years. Franz Wegeler, a young medical student, introduced him to the von Breuning family (one of whose daughters Wegeler eventually married). Beethoven often visited the von Breuning household, where he taught piano to some of the children. Here he encountered German and classical literature. The von Breuning family environment was less stressful than his own, which was increasingly dominated by his father's decline. Beethoven also came to the attention of Count Ferdinand von Waldstein, who became a lifelong friend and financial supporter.

In 1789 Beethoven obtained a legal order by which half of his father's salary was paid directly to him for support of the family. He also contributed further to the family's income by playing viola in the court orchestra. This familiarized Beethoven with a variety of operas, including three by Mozart that were performed at court in this period. He also befriended Anton Reicha, a flautist and violinist of about his own age who was a nephew of the court orchestra's conductor, Josef Reicha.

Beethoven was probably first introduced to Joseph Haydn in late 1790, when the latter was traveling to London and stopped in Bonn around Christmas time. They met in Bonn on Haydn's return trip from London to Vienna in July 1792, and it is likely that arrangements were made at that time for Beethoven to study with the old master. With the Elector's help, Beethoven moved to Vienna in 1792. From 1790 to 1792, Beethoven composed a significant number of works (none were published at the time, and most are now listed as works without opus) that demonstrated his growing range and maturity. Musicologists identified a theme similar to those of his third symphony in a set of variations written in 1791. Beethoven left Bonn for Vienna in November 1792, amid rumors of war spilling out of France, and learned shortly after his arrival that his father had died. Count Waldstein in his farewell note to Beethoven wrote: "Through uninterrupted diligence you will receive Mozart's spirit through Haydn's hands." Over the next few years, Beethoven responded to the widespread feeling that he was a successor to the recently deceased Mozart by studying that master's work and writing works with a distinctly Mozartean flavor.

Beethoven did not immediately set out to establish himself as a composer, but rather devoted himself to study and performance. Working under Haydn's direction, he sought to master counterpoint. He also studied violin under Ignaz Schuppanzigh. Early in this period, he also began receiving occasional instruction from Antonio Salieri, primarily in Italian vocal composition style; this relationship persisted until at least 1802, and possibly 1809. With Haydn's departure for England in 1794, Beethoven was expected by the Elector to return home. He chose instead to remain in Vienna, continuing his instruction in counterpoint with Johann Albrechtsberger and other teachers. Although his stipend from the Elector expired, a number of Viennese noblemen had already recognized his ability and offered him financial support, among them Prince Joseph Franz Lobkowitz, Prince Karl Lichnowsky, and Baron Gottfried van Swieten.

By 1793, Beethoven established a reputation as an improviser in the salons of the nobility, often playing the preludes and fugues of J.S. Bach's Well - Tempered Clavier. His friend Nikolaus Simrock had begun publishing his compositions; the first are believed to be a set of variations (WoO 66). By 1793, he had established a reputation in Vienna as a piano virtuoso, but he apparently withheld works from publication so that their publication in 1795 would have greater impact. Beethoven's first public performance in Vienna was in March 1795, a concert in which he first performed one of his piano concertos. It is uncertain whether this was the First or Second. Documentary evidence is unclear, and both concertos were in a similar state of near completion (neither was completed or published for several years). Shortly after this performance, he arranged for the publication of the first of his compositions to which he assigned an opus number, the three piano trios, Opus 1. These works were dedicated to his patron Prince Lichnowsky, and were a financial success; Beethoven's profits were nearly sufficient to cover his living expenses for a year.

Beethoven composed his first six string quartets (Op. 18) between 1798 and 1800 (commissioned by, and dedicated to, Prince Lobkowitz). They were published in 1801. With premieres of his First and Second Symphonies in 1800 and 1803, Beethoven became regarded as one of the most important of a generation of young composers following Haydn and Mozart. He also continued to write in other forms, turning out widely known piano sonatas like the "Pathétique" sonata (Op. 13), which Cooper describes as "surpass[ing] any of his previous compositions, in strength of character, depth of emotion, level of originality, and ingenuity of motivic and tonal manipulation." He also completed his Septet (Op. 20) in 1799, which was one of his most popular works during his lifetime.

For the premiere of his First Symphony, Beethoven hired the Burgtheater on 2 April 1800, and staged an extensive program of music, including works by Haydn and Mozart, as well as his Septet, the First Symphony, and one of his piano concertos (the latter three works all then unpublished). The concert, which the Allgemeine musikalische Zeitung described as "the most interesting concert in a long time," was not without difficulties; among the criticisms was that "the players did not bother to pay any attention to the soloist."

Mozart and Haydn were undeniable influences. For example, Beethoven's quintet for piano and winds is said to bear a strong resemblance to Mozart's work for the same configuration, albeit with his own distinctive touches. But Beethoven's melodies, musical development, use of modulation and texture, and characterization of emotion all set him apart from his influences, and heightened the impact some of his early works made when they were first published. By the end of 1800 Beethoven and his music were already much in demand from patrons and publishers.

In May 1799, Beethoven taught piano to the daughters of Hungarian Countess Anna Brunsvik. During this time, Beethoven fell in love with the younger daughter Josephine who has therefore been identified as one of the more likely candidates for the addressee of his letter to the "Immortal Beloved" (in 1812). Shortly after these lessons, Josephine was married to Count Josef Deym. Beethoven was a regular visitor at their house, continuing to teach Josephine, and playing at parties and concerts. Her marriage was by all accounts happy (despite initial financial problems), and the couple had four children. Her relationship with Beethoven intensified after Deym died suddenly in 1804.

Beethoven had few other students. From 1801 to 1805, he tutored Ferdinand Ries, who went on to become a composer and later wrote Beethoven remembered, a book about their encounters. The young Carl Czerny studied with Beethoven from 1801 to 1803. Czerny went on to become a renowned music teacher himself, instructing Franz Liszt, and gave the Vienna premiere of Beethoven's fifth piano concerto (the "Emperor") in 1812.

Beethoven's compositions between 1800 and 1802 were dominated by two large scale orchestral works, although he continued to produce other important works such as the piano sonata Sonata quasi una fantasia known as the "Moonlight Sonata". In the spring of 1801 he completed The Creatures of Prometheus, a ballet. The work received numerous performances in 1801 and 1802, and Beethoven rushed to publish a piano arrangement to capitalize on its early popularity. In the spring of 1802 he completed the Second Symphony, intended for performance at a concert that was canceled. The symphony received its premiere instead at a subscription concert in April 1803 at the Theater an der Wien, where Beethoven had been appointed composer in residence. In addition to the Second Symphony, the concert also featured the First Symphony, the Third Piano Concerto, and the oratorio Christ on the Mount of Olives. Reviews were mixed, but the concert was a financial success; Beethoven was able to charge three times the cost of a typical concert ticket.

Beethoven's business dealings with publishers also began to improve in 1802 when his brother Carl, who had previously assisted him casually, began to assume a larger role in the management of his affairs. In addition to negotiating higher prices for recently composed works, Carl also began selling some of Beethoven's earlier unpublished works, and encouraged Beethoven (against the latter's preference) to also make arrangements and transcriptions of his more popular works for other instrument combinations. Beethoven acceded to these requests, as he could not prevent publishers from hiring others to do similar arrangements of his works.

Around 1796, by the age of 26, Beethoven began to lose his hearing. He suffered from a severe form of tinnitus, a "ringing" in his ears that made it hard for him to hear music; he also avoided conversation. The cause of Beethoven's deafness is unknown, but it has variously been attributed to typhus, auto - immune disorders (such as systemic lupus erythematosus), and even his habit of immersing his head in cold water to stay awake. The explanation from Beethoven's autopsy was that he had a "distended inner ear," which developed lesions over time.

As early as 1801, Beethoven wrote to friends describing his symptoms and the difficulties they caused in both professional and social settings (although it is likely some of his close friends were already aware of the problems). Beethoven, on the advice of his doctor, lived in the small Austrian town of Heiligenstadt, just outside Vienna, from April to October 1802 in an attempt to come to terms with his condition. There he wrote his Heiligenstadt Testament, a letter to his brothers which records his thoughts of suicide due to his growing deafness and records his resolution to continue living for and through his art. Over time, his hearing loss became profound: there is a well attested story that, at the end of the premiere of his Ninth Symphony, he had to be turned around to see the tumultuous applause of the audience; hearing nothing, he wept. Beethoven's hearing loss did not prevent his composing music, but it made playing at concerts — a lucrative source of income — increasingly difficult. After a failed attempt in 1811 to perform his own Piano Concerto No. 5 (the "Emperor"), which was premiered by his student Carl Czerny, he never performed in public again.

A large collection of Beethoven's hearing aids, such as a special ear horn, can be viewed at the Beethoven House Museum in Bonn, Germany. Despite his obvious distress, Carl Czerny remarked that Beethoven could still hear speech and music normally until 1812. By 1814 however, Beethoven was almost totally deaf, and when a group of visitors saw him play a loud arpeggio of thundering bass notes at his piano remarking, "Ist es nicht schön?" (Is it not beautiful?), they felt deep sympathy considering his courage and sense of humor (he lost the ability to hear higher frequencies first).

As a result of Beethoven's hearing loss, his conversation books are an unusually rich written resource. Used primarily in the last ten or so years of his life, his friends wrote in these books so that he could know what they were saying, and he then responded either orally or in the book. The books contain discussions about music and other matters, and give insights into Beethoven's thinking; they are a source for investigations into how he intended his music should be performed, and also his perception of his relationship to art. Out of a total of 400 conversation books, it has been suggested that 264 were destroyed (and others were altered) after Beethoven's death by Anton Schindler, who wished only an idealized biography of the composer to survive.

While Beethoven earned income from publication of his works and from public performances, he also depended on the generosity of patrons for income, for whom he gave private performances and copies of works they commissioned for an exclusive period prior to their publication. Some of his early patrons, including Prince Lobkowitz and Prince Lichnowsky, gave him annual stipends in addition to commissioning works and purchasing published works.

Perhaps Beethoven's most important aristocratic patron was Archduke Rudolph, the youngest son of Emperor Leopold II, who in 1803 or 1804 began to study piano and composition with Beethoven. The cleric (Cardinal - Priest) and the composer became friends, and their meetings continued until 1824. Beethoven dedicated 14 compositions to Rudolph, including the Archduke Trio (1811) and his great Missa Solemnis (1823). Rudolph, in turn, dedicated one of his own compositions to Beethoven. The letters Beethoven wrote to Rudolph are today kept at the Gesellschaft der Musikfreunde in Vienna.

In the Autumn of 1808, after having been rejected for a position at the royal theater, Beethoven received an offer from Napoleon's brother Jérôme Bonaparte, then king of Westphalia, for a well paid position as Kapellmeister at the court in Cassel. To persuade him to stay in Vienna, the Archduke Rudolph, Prince Kinsky and Prince Lobkowitz, after receiving representations from the composer's friends, pledged to pay Beethoven a pension of 4000 florins a year. Only Archduke Rudolph paid his share of the pension on the agreed date. Kinsky, immediately called to military duty, did not contribute and soon died after falling from his horse. Lobkowitz stopped paying in September 1811. No successors came forward to continue the patronage, and Beethoven relied mostly on selling composition rights and a small pension after 1815. The effects of these financial arrangements were undermined to some extent by war with France, which caused significant inflation when the government printed money to fund its war efforts.

Beethoven's return to Vienna from Heiligenstadt was marked by a change in musical style, and is now designated as the start of his "Middle" or "Heroic" period. According to Carl Czerny, Beethoven said, "I am not satisfied with the work I have done so far. From now on I intend to take a new way." This "Heroic" phase was characterized by a large number of original works composed on a grand scale. The first major work employing this new style was the Third Symphony in E flat, known as the "Eroica". This work was longer and larger in scope than any previous symphony. When it premiered in early 1805 it received a mixed reception. Some listeners objected to its length or misunderstood its structure, while others viewed it as a masterpiece.

The "middle period" is sometimes associated with a "heroic" manner of composing, but the use of the term "heroic" has become increasingly controversial in Beethoven scholarship. The term is more frequently used as an alternative name for the middle period. The appropriateness of the term "heroic" to describe the whole middle period has been questioned as well: while some works, like the Third and Fifth Symphonies, are easy to describe as "heroic", many others, like the "Pastoral" Sixth Symphony, are not.

Some of the middle period works extend the musical language Beethoven had inherited from Haydn and Mozart. The middle period work includes the Third through Eighth Symphonies, the Rasumovsky, Harp and Serioso string quartets, the "Waldstein" and "Appassionata" piano sonatas, Christ on the Mount of Olives, the opera Fidelio, the Violin Concerto and many other compositions. During this time Beethoven's income came from publishing his works, from performances of them, and from his patrons. His position at the Theater an der Wien was terminated when the theater changed management in early 1804, and he was forced to move temporarily to the suburbs of Vienna with his friend Stephan von Breuning. This slowed work on Fidelio, his largest work to date, for a time. It was delayed again by the Austrian censor, and finally premiered in November 1805 to houses that were nearly empty because of the French occupation of the city. In addition to being a financial failure, this version of Fidelio was also a critical failure, and Beethoven began revising it.

During May 1809, when the attacking forces of Napoleon bombarded Vienna, according to Ferdinand Ries, Beethoven, very worried that the noise would destroy what remained of his hearing, hid in the basement of his brother's house, covering his ears with pillows.

The work of the middle period established Beethoven as a master. In a review from 1810, he was enshrined by E.T.A. Hoffmann as one of the three great "Romantic" composers; Hoffman called Beethoven's Fifth Symphony "one of the most important works of the age."

Beethoven's love life was hampered by class issues. In late 1801 he met a young countess, Julie ("Giulietta") Guicciardi through the Brunsvik family, at a time when he was giving regular piano lessons to Josephine Brunsvik. Beethoven mentions his love for Julie in a November 1801 letter to his boyhood friend, Franz Wegeler, but he could not consider marrying her, due to the class difference. Beethoven later dedicated to her his Sonata No. 14, now commonly known as the "Moonlight" Sonata.

His relationship with Josephine Brunsvik deepened after the death in 1804 of her aristocratic first husband, the Count Joseph Deym. Beethoven wrote Josephine 15 passionate love letters between late 1804 to around 1809/10. Although his feelings were obviously reciprocated, Josephine was forced by her family to withdraw from him in 1807. She cited her "duty" and the fact that she would have lost the custodianship of her aristocratic children had she remarried to a commoner. After Josephine married Baron von Stackelberg in 1810, Beethoven may have proposed unsuccessfully to Therese Malfatti, the supposed dedicatee of "Für Elise"; his status as a commoner may again have interfered with those plans.

In the spring of 1811 Beethoven became seriously ill, suffering headaches and high fever. On the advice of his doctor, he spent six weeks in the Bohemian spa town of Teplitz. The following winter, which was dominated by work on the Seventh symphony, he was again ill, and his doctor ordered him to spend the summer of 1812 at the spa Teplitz. It is certain that he was at Teplitz when he wrote a love letter to his "Immortal Beloved." The identity of the intended recipient has long been a subject of debate; candidates include Julie Guicciardi, Therese Brunsvik, Josephine Brunsvik, and Antonie Brentano.

Beethoven visited his brother Johann at the end of October 1812. He wished to end Johann's cohabitation with Therese Obermayer, a woman who already had an illegitimate child. He was unable to convince Johann to end the relationship, and appealed to the local civic and religious authorities. Johann and Therese married on 9 November.

In early 1813 Beethoven apparently went through a difficult emotional period, and his compositional output dropped. His personal appearance degraded – it had generally been neat – as did his manners in public, especially when dining. Beethoven took care of his brother (who was suffering from tuberculosis) and his family, an expense that he claimed left him penniless.

Beethoven was finally motivated to begin significant composition again in June 1813, when news arrived of the defeat of one of Napoleon's armies at Vitoria, Spain, by a coalition of forces under the Duke of Wellington. This news stimulated him to write the battle symphony known as Wellington's Victory. It was first performed on 8 December, along with his Seventh Symphony, at a charity concert for victims of the war. The work was a popular hit, probably because of its programmatic style that was entertaining and easy to understand. It received repeat performances at concerts Beethoven staged in January and February 1814. Beethoven's renewed popularity led to demands for a revival of Fidelio, which, in its third revised version, was also well received at its July opening. That summer he composed a piano sonata for the first time in five years (No. 27, Opus 90). This work was in a markedly more Romantic style than his earlier sonatas. He was also one of many composers who produced music in a patriotic vein to entertain the many heads of state and diplomats that came to the Congress of Vienna that began in November 1814. His output of songs included his only song cycle, "An die ferne Geliebte," and the extraordinarily expressive second setting of the poem "An die Hoffnung" (Op. 94) in 1815. Compared to its first setting in 1805 (a gift for Josephine Brunsvik) it was "far more dramatic... The entire spirit is that of an operatic scena."

Between 1815 and 1817 Beethoven's output dropped again. Beethoven attributed part of this to a lengthy illness (he called it an "inflammatory fever") that afflicted him for more than a year, starting in October 1816. Biographers have speculated on a variety of other reasons that also contributed to the decline, including the difficulties in the personal lives of his would be paramours and the harsh censorship policies of the Austrian government. The illness and death of his brother Carl from consumption may also have played a role.

Carl had been ill for some time, and Beethoven spent a small fortune in 1815 on his care. After Carl died on 15 November 1815, Beethoven immediately became embroiled in a protracted legal dispute with Carl's wife Johanna over custody of their son Karl, then nine years old. Beethoven, who considered Johanna an unfit parent because of her morals (she had an illegitimate child by a different father before marrying Carl, and had been convicted of theft) and financial management, had successfully applied to Carl to have himself named sole guardian of the boy. A late codicil to Carl's will gave him and Johanna joint guardianship. While Beethoven was successful at having his nephew removed from her custody in February 1816, the case was not fully resolved until 1820, and he was frequently preoccupied by the demands of the litigation and seeing to Karl's welfare, whom he first placed in a private school.

The Austrian court system had one court for the nobility and members of the Landtafel, the R&I Landrechte, and many other courts for commoners, among them the Civil Court of the Vienna Magistrate. Beethoven disguised the fact that the Dutch "van" in his name did not denote nobility as does the German "von" and his case was tried in the Landrechte. Owing to his influence with the court, Beethoven felt assured of the favorable outcome of being awarded sole guardianship. While giving evidence to the Landrechte, however, Beethoven inadvertently admitted that he was not nobly born. The case was transferred to the Magistracy on 18 December 1818, where he lost sole guardianship.

Beethoven appealed, and regained custody. Johanna's appeal to the Emperor was not successful: the Emperor "washed his hands of the matter." During the years of custody that followed, Beethoven attempted to ensure that Karl lived to the highest moral standards. Beethoven had an overbearing manner and frequently interfered in his nephew's life. Karl attempted suicide on 31 July 1826 by shooting himself in the head. He survived, and was brought to his mother's house, where he recuperated. He and Beethoven were reconciled, but Karl insisted on joining the army, and last saw Beethoven in early 1827.

The only major works Beethoven produced during this time were two cello sonatas, a piano sonata, and collections of folk song settings.

Beethoven began a renewed study of older music, including works by J.S. Bach and Handel, that were then being published in the first attempts at complete editions. He composed the Consecration of the House Overture, which was the first work to attempt to incorporate these influences. A new style emerged, now called his "Late period". He returned to the keyboard to compose his first piano sonatas in almost a decade: the works of the Late period are commonly held to include the last five piano sonatas and the Diabelli Variations, the last two sonatas for cello and piano, the late string quartets, and two works for very large forces: the Missa Solemnis and the Ninth Symphony.

By early 1818 Beethoven's health had improved, and his nephew moved in with him in January. On the downside, his hearing had deteriorated to the point that conversation became difficult, necessitating the use of conversation books. His household management had also improved somewhat; Nanette Streicher, who had assisted in his care during his illness, continued to provide some support, and he finally found a skilled cook. His musical output in 1818 was still somewhat reduced, but included song collections and the Hammerklavier Sonata, as well as sketches for two symphonies that eventually coalesced into the epic Ninth. In 1819 he was again preoccupied by the legal processes around Karl, and began work on the Diabelli Variations and the Missa Solemnis.

For the next few years he continued to work on the Missa, composing piano sonatas and bagatelles to satisfy the demands of publishers and the need for income, and completing the Diabelli Variations. He was ill again for an extended time in 1821, and completed the Missa in 1823, three years after its original due date. He also opened discussions with his publishers over the possibility of producing a complete edition of his work, an idea that was arguably not fully realized until 1971. Beethoven's brother Johann began to take a hand in his business affairs, much in the way Carl had earlier, locating older unpublished works to offer for publication and offering the Missa to multiple publishers with the goal of getting a higher price for it.

Two commissions in 1822 improved Beethoven's financial prospects. The Philharmonic Society of London offered a commission for a symphony, and Prince Nikolay Golitsin of St. Petersburg offered to pay Beethoven's price for three string quartets. The first of these commissions spurred Beethoven to finish the Ninth Symphony, which was first performed, along with the Missa Solemnis, on 7 May 1824, to great acclaim at the Kärntnertortheater. The Allgemeine musikalische Zeitung gushed, "inexhaustible genius had shown us a new world," and Carl Czerny wrote that his symphony "breathes such a fresh, lively, indeed youthful spirit [...] so much power, innovation, and beauty as ever [came] from the head of this original man, although he certainly sometimes led the old wigs to shake their heads." Unlike his more lucrative earlier concerts, this did not make Beethoven much money, as the expenses of mounting it were significantly higher. A second concert on 24 May, in which the producer guaranteed Beethoven a minimum fee, was poorly attended; nephew Karl noted that "many people have already gone into the country." It was Beethoven's last public concert.

Beethoven then turned to writing the string quartets for Golitsin. This series of quartets, known as the "Late Quartets," went far beyond what musicians or audiences were ready for at that time. One musician commented that "we know there is something there, but we do not know what it is." Composer Louis Spohr called them "indecipherable, uncorrected horrors." Opinion has changed considerably from the time of their first bewildered reception: their forms and ideas inspired musicians and composers including Richard Wagner and Béla Bartók, and continue to do so. Of the late quartets, Beethoven's favorite was the Fourteenth Quartet, op. 131 in C# minor, which he rated as his most perfect single work. The last musical wish of Schubert was to hear the Op. 131 quartet, which he did on 14 November 1828, five days before his death.

Beethoven wrote the last quartets amidst failing health. In April 1825 he was bedridden, and remained ill for about a month. The illness — or more precisely, his recovery from it — is remembered for having given rise to the deeply felt slow movement of the Fifteenth Quartet, which Beethoven called "Holy song of thanks ('Heiliger dankgesang') to the divinity, from one made well." He went on to complete the quartets now numbered Thirteenth, Fourteenth, and Sixteenth. The last work completed by Beethoven was the substitute final movement of the Thirteenth Quartet, which replaced the difficult Große Fuge. Shortly thereafter, in December 1826, illness struck again, with episodes of vomiting and diarrhea that nearly ended his life.

Beethoven was bedridden for most of his remaining months, and many friends came to visit. He died on Monday, 26 March 1827, during a thunderstorm. His friend Anselm Hüttenbrenner, who was present at the time, claimed that there was a peal of thunder at the moment of death. An autopsy revealed significant liver damage, which may have been due to heavy alcohol consumption. It also revealed considerable dilation of the auditory and other related nerves.

Beethoven's funeral procession on 29 March 1827 was attended by an estimated 20,000 Viennese citizens. Franz Schubert, who died the following year and was buried next to Beethoven, was one of the torchbearers. Unlike Mozart, who was buried anonymously in a communal grave (the custom at the time), Beethoven was buried in a dedicated grave in the Währing cemetery, north west of Vienna, after a requiem mass at the church of the Holy Trinity (Dreifaltigkeitskirche). His remains were exhumed for study in 1862, and moved in 1888 to Vienna's Zentralfriedhof.

There is dispute about the cause of Beethoven's death: alcoholic cirrhosis, syphilis, infectious hepatitis, lead poisoning, sarcoidosis and Whipple's disease have all been proposed. Friends and visitors before and after his death clipped locks of his hair, some of which have been preserved and subjected to additional analysis, as have skull fragments removed during the 1862 exhumation. Some of these analyses have led to controversial assertions that Beethoven was accidentally poisoned to death by excessive doses of lead based treatments administered under instruction from his doctor.

Beethoven's personal life was troubled by his encroaching deafness and irritability brought on by chronic abdominal pain (beginning in his twenties) which led him to contemplate suicide (documented in his Heiligenstadt Testament). Beethoven was often irascible. It has been suggested he suffered from bipolar disorder. Nevertheless, he had a close and devoted circle of friends all his life, thought to have been attracted by his strength of personality. Toward the end of his life, Beethoven's friends competed in their efforts to help him cope with his incapacities.

Sources show Beethoven's disdain for authority, and for social rank. He stopped performing at the piano if the audience chatted amongst themselves, or afforded him less than their full attention. At soirées, he refused to perform if suddenly called upon to do so. Eventually, after many confrontations, the Archduke Rudolph decreed that the usual rules of court etiquette did not apply to Beethoven.

Beethoven was attracted to the ideals of the Enlightenment. In 1804, when Napoleon's imperial ambitions became clear, Beethoven took hold of the title page of his Third Symphony and scratched the name Bonaparte out so violently that he made a hole in the paper. He later changed the work's title to "Sinfonia Eroica, composta per festeggiare il sovvenire d'un grand'uom" ("Heroic Symphony, composed to celebrate the memory of a great man"), and he rededicated it to his patron, Prince Joseph Franz von Lobkowitz, at whose palace it was first performed.

The fourth movement of his Ninth Symphony features an elaborate choral setting of Schiller's Ode An die Freude ("Ode to Joy"), an optimistic hymn championing the brotherhood of humanity.

Beethoven is acknowledged as one of the giants of classical music; occasionally he is referred to as one of the "three Bs" (along with Bach and Brahms) who epitomize that tradition. He was also a pivotal figure in the transition from the 18th century musical classicism to 19th century romanticism, and his influence on subsequent generations of composers was profound.

Beethoven composed in several musical genres and for a variety of instrument combinations. His works for symphony orchestra include nine symphonies (the Ninth Symphony includes a chorus), and about a dozen pieces of "occasional" music. He wrote seven concerti for one or more soloists and orchestra, as well as four shorter works that include soloists accompanied by orchestra. His only opera is Fidelio; other vocal works with orchestral accompaniment include two masses and a number of shorter works.

His large body of compositions for piano includes 32 piano sonatas and numerous shorter pieces, including arrangements of some of his other works. Works with piano accompaniment include 10 violin sonatas, 5 cello sonatas, and a sonata for French horn, as well as numerous lieder.

Beethoven also wrote a significant quantity of chamber music. In addition to 16 string quartets, he wrote five works for string quintet, seven for piano trio, five for string trio, and more than a dozen works for various combinations of wind instruments.

Beethoven's compositional career is usually divided into Early, Middle, and Late periods. In this scheme, his early period is taken to last until about 1802, the middle period from about 1803 to about 1814, and the late period from about 1815.

In his Early period, Beethoven's work was strongly influenced by his predecessors Haydn and Mozart. He also explored new directions and gradually expanded the scope and ambition of his work. Some important pieces from the Early period are the first and second symphonies, the set of six string quartets Opus 18, the first two piano concertos, and the first dozen or so piano sonatas, including the famous Pathétique sonata, Op. 13.

His Middle (Heroic) period began shortly after Beethoven's personal crisis brought on by his recognition of encroaching deafness. It includes large scale works that express heroism and struggle. Middle period works include six symphonies (Nos. 3–8), the last three piano concertos, the Triple Concerto and violin concerto, five string quartets (Nos. 7–11), several piano sonatas (including the Moonlight, Waldstein and Appassionata sonatas), the Kreutzer violin sonata and Beethoven's only opera, Fidelio.

Beethoven's Late period began around 1815. Works from this period are characterized by their intellectual depth, their formal innovations, and their intense, highly personal expression. The String Quartet, Op. 131 has seven linked movements, and the Ninth Symphony adds choral forces to the orchestra in the last movement. Other compositions from this period include the Missa Solemnis, the last five string quartets (including the massive Große Fuge) and the last five piano sonatas.

Eroica is a 1949 Austrian film depicting life and works of Beethoven (Ewald Balser). It was entered into the 1949 Cannes Film Festival. The film is directed by Walter Kolm - Veltée, produced by Guido Bagier with Walter Kolm - Veltée and written by Walter Kolm - Veltée with Franz Tassié.

In 1962, Walt Disney produced a made - for - television, largely fictionalized, life of Beethoven titled The Magnificent Rebel, starring Karlheinz Böhm as Beethoven. The film was given a two-part premiere on the Walt Disney anthology television series, and was released to theaters in Europe.

In 1994 a film about Beethoven (played by Gary Oldman) entitled Immortal Beloved was written and directed by Bernard Rose. The story follows Beethoven's secretary and first biographer, Anton Schindler (portrayed by Jeroen Krabbé), as he attempts to ascertain the true identity of the Unsterbliche Geliebte (Immortal Beloved) addressed in three letters found in the late composer's private papers. Schindler journeys throughout the Austrian Empire to interview potential candidates. Filming took place in the Czech cities of Prague and Kromeriz, and the Zentralfriedhof in Vienna, Austria, between 23 May and 29 July 1994.

In 2003 a made - for - television BBC / Opus Arte film Eroica dramatized the 1804 first performance of the Eroica Symphony at the palace of Prince Lobkowitz. Ian Hart was cast as Beethoven, while Jack Davenport played Prince Lobkowitz; the Orchestre Révolutionnaire et Romantique conducted by Sir John Eliot Gardiner perform the Symphony in its entirety during the film.

In a 2005 three part BBC miniseries, Beethoven was played by Paul Rhys.

A movie entitled Copying Beethoven was released in 2006, starring Ed Harris as Beethoven. This film is a fictionalized account of Beethoven's production of his Ninth Symphony.

The Beethoven Monument, Bonn, was unveiled in August 1845, in honor of his 75th anniversary. It was the first statue of a composer created in Germany, and the music festival that accompanied the unveiling was the impetus for the very hasty construction of the original Beethovenhalle in Bonn (it was designed and built within less than a month, on the urging of Franz Liszt). A statue to Mozart had been unveiled in Salzburg, Austria, in 1842. Vienna did not honor Beethoven with a statue until 1880.