Jan Pieterszoon Sweelinck (April or May, 1562–October 16, 1621) was a Dutch composer, organist, and pedagogue whose work straddled the end of the Renaissance and beginning of the Baroque eras. He was born in Deventer, Netherlands and died in Amsterdam. Many of his family were musicians—principally organists—and he is known to have studied with Jan Willemszoon Lossy as well as Zarlino, the famous composer and theorist, in Venice. Sweelinck represents the highest development of the Dutch keyboard school