 The prince's interest in collecting music was sufficiently well known that in 1713, when one of Bach's pupils, P. D. Kräuter, was requesting leave of absence to study in Weimar, he mentioned the French and Italian music that the prince was expected to introduce there.The prince also composed, and Bach wrote the Organ Concerto No.1 in G Major, BWV 592, and Concerto for Organ solo in C major, BWV 595, after a theme by the prince.In Zerbst on 11 October 1685 Johann Ernst married firstly Sophie Auguste of Anhalt-Zerbst.