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, his birthplace (1595, 1616). Sweelinck's longest voyage was to Antwerp 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. Works 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 vocal works (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