As Capellmeister, Bach was in charge of all musical matters at the court of Cöthen. Although the prince’s Reformed religious faith ruled out the performance of church cantatas, Bach did compose occasional vocal works for special occasions. His chief works of this period, however, were suites, sonatas, and concertos for the court instrumental ensemble, as well as keyboard music for his family and pupils. Among the famous compositions composed or completed at Cöthen and discussed in this chapter are the inventions, Well-Tempered Clavier, organ sonatas, cello suites, sonatas and partitas for violin and flute, and Brandenburg Concertos.