• Composer and Singer Jacopo Peri, 1561
• Composer and Organist Jan Pieterszoon Sweelinck, 1562

Peri was born in Rome, but studied in Florence with Cristofano Malvezzi, and went on to work in a number of churches there, both as an organist and as a singer. He subsequently began to work in the Medici court, first as a tenor singer and keyboard player, and later as a composer. His earliest works were incidental music for plays, intermedi and madrigals.

In the 1590s, Peri became associated with Jacopo Corsi, the leading patron of music in Florence. They felt contemporary art was inferior to classical Greek and Roman works, and decided to attempt to recreate Greek tragedy, as they understood it. Their work added to that of the Florentine Camerata of the previous decade, which produced the first experiments in monody, the solo song style over continuo bass which eventually developed into recitative and aria. Peri and Corsi brought in the poet Ottavio Rinuccini to write a text, and the result, Dafne, though nowadays thought to be a long way from anything the Greeks would have recognized, is seen as the first work in a new form, opera.

Rinuccini and Peri next collaborated on Euridice. This was first performed on 6 October 1600 at the Palazzo Pitti. Unlike Dafne, it has survived to the present day (though it is hardly ever staged, and then only as a historical curio). The work made use of recitatives, a new development which went between the arias and choruses and served to move the action along.

Peri produced a number of other operas, often in collaboration with other composers (such as La Flora with Marco da Gagliano), and also wrote a number of other pieces for various court entertainments. Few of his pieces are still performed today, and even by the time of his death his operatic style was looking rather old fashioned when compared to the work of relatively younger reformist composers such as Claudio Monteverdi. Peri's influence on those later composers, however, was large.

According to Cornelis Plemp, a pupil and friend of Sweelinck's, he started his 44 year career as organist of the Oude Kerk in 1577, when he was just 15. This date, however, is uncertain, because the church records from 1577 – 80 are missing and Sweelinck can only be traced in Oude Kerk from 1580 onwards; he occupied the post for the rest of his life. Sweelinck's widowed mother died in 1585, and Jan Pieterszoon took responsibility for his younger brother and sister. His salary of 100 florins was doubled the next year, presumably to help matters. In addition, he was offered an additional 100 guilders in the event that he married, which happened in 1590 when he married Claesgen Dircxdochter Puyner from Medemblik. He was also offered the choice between a further 100 guilders and free accommodations in a house belonging to the town, the latter of which he chose. Sweelinck's first published works date from around 1592 – 94: three volumes of chansons, the last of which is the only remaining volume published in 1594 (for reasons that are not certain, the composer adopted his mother's last name; "Sweelinck" first appears on the title page of the 1594 publication). Sweelinck then set to publishing psalm settings, aiming to set the entire Psalter. These works appeared in four large volumes published in 1604, 1613, 1614 and 1621. The last volume was published posthumously and, presumably, in unfinished form. Sweelinck died of unknown causes on 16 October 1621 and was buried in the Oude Kerk. He was survived by his wife and five of their six children; the eldest of them, Dirck Janszoon, succeeded his father as organist of the Oude Kerk.

The composer most probably spent his entire life in Amsterdam, only occasionally visiting other cities in connection with his professional activities: he was asked to inspect organs, give opinions and advice on organ building and restoration, etc. These duties resulted in short visits to Delft, Dordrecht (1614), Enkhuizen, Haarlem (1594), Harderwijk (1608), Middelburg (1603), Nijmegen (1605), Rotterdam (1610), Rhenen (1616), as well as Deventer (1595, 1616) his birthplace. Sweelinck's longest voyage was to Antwerpen in 1604, when he was commissioned by the Amsterdam authorities to buy a harpsichord for the city. No documentary evidence has turned up to support the tradition, going back to Mattheson, that Sweelinck visited Venice - perhaps a confusion with his brother, the painter Gerrit Pietersz Sweelink, who did - and similarly there is no evidence that he ever crossed the English Channel, although copies of his music did such as the pieces included in the Fitzwilliam Virginal Book. His popularity as a composer, performer and teacher increased steadily during his lifetime. Contemporaries nicknamed him Orpheus of Amsterdam and even the city authorities frequently brought important visitors to hear Sweelinck's improvisations.

Sweelinck's only duties in Amsterdam were those of an organist. Contrary to custom, he did not play the carillon or the harpsichord on formal occasions; nor was he regularly required to produce compositions. Calvinist services did not typically include organ playing due to the belief in what is now called the Regulative Principle. The Regulative Principle restricted the elements of worship to only that which was commanded in the New Testament. However, the Consistory of Dordrecht of 1598 instructed organists to play variations on the new Genevan psalm tunes before and after the service so that the people would become familiar with them. Sweelinck was employed instead by the city itself. As he worked for Protestant magistrates the remainder of his life, it is likely that he was an adherent of Calvinism. In the 1590s three of his children were baptized in the Oude Kerk. His employment allowed him time for teaching, for which he was to become as famous as for his compositions. Sweelinck's pupils included the core of what was to become the north German organ school: Jacob Praetorius II, Heinrich Scheidemann, Paul Siefert, Melchior Schildt and Samuel and Gottfried Scheidt. Students of Sweelinck were seen as musicians against whom other organists were measured. Sweelinck was known in Germany as the "maker of organists." Sociable and respected, he was in great demand as a teacher. His Dutch pupils were undoubtedly many, but none of them became composers of note. Sweelinck, however, influenced the development of the Dutch organ school, as is shown in the work of later composers such as Anthoni van Noordt. Sweelinck, in the course of his career, had set music to the liturgies of Roman Catholicism, Calvinism and Lutheranism. He was the most important composer of the musically rich "golden era" of the Netherlands.

Sweelinck's influence spread as far as Sweden and England, carried to the former by Andreas Düben and to the latter by English composers such as Peter Philips, who probably met Sweelinck in 1593. Sweelinck, and Dutch composers in general, had evident links to the English school of composition. Sweelinck's music appears in the Fitzwilliam Virginal Book, which mostly contains the work of English composers. He wrote variations on John Dowland's famous Lachrimae Pavane. John Bull, who was probably a personal friend, wrote a set of variations on a theme by Sweelinck after the death of the Dutch composer.

Sweelinck represents the highest development of the Dutch keyboard school, and indeed represented a pinnacle in keyboard contrapuntal complexity and refinement before J.S. Bach. However, he was a skilled composer for voices as well, and composed more than 250 works for voice (chansons, madrigals, motets and Psalms).

Some of Sweelinck's innovations were of profound musical importance, including the fugue — he was the first to write an organ fugue which began simply, with one subject, successively adding texture and complexity until a final climax and resolution, an idea which was perfected at the end of the Baroque era by Bach. It is also generally thought that many of Sweelinck's keyboard works were intended as studies for his pupils. He was also the first to use the pedal as a real fugal part. Stylistically Sweelinck's music also brings together the richness, complexity and spatial sense of Andrea and Giovanni Gabrieli, with whom he was familiar from his time in Venice, and the ornamentation and intimate forms of the English keyboard composers. In some of his works Sweelinck appears as a composer of the baroque style, with the exception of his chansons which mostly resemble the French Renaissance tradition. In formal development, especially in the use of countersubject, stretto and organ point (pedal point), his music looks ahead to Bach (who was quite possibly familiar with Sweelinck’s music).

Sweelinck was a master improviser, and acquired the informal title of the "Orpheus of Amsterdam". More than 70 of his keyboard works have survived, and many of them may be similar to the improvisations that residents of Amsterdam around 1600 were likely to have heard. In the course of his life, Sweelinck was involved with the musical liturgies of three distinctly different church types: the Roman Catholic, the Calvinist, and the Lutheran — all of which are reflected in his work. Even his vocal music, which is more conservative than his keyboard writing, shows a striking rhythmic complexity and an unusual richness of contrapuntal devices.