he became the "kapellmeister" of the dresden court in around 1730. he arrived at dresden in 1731. his employer was king august ii of poland. he wrote operas and church music in dresden. in dresden, he wrote the opera "cleofide". the opera uses text by metastasio. johann sebastian bach and his son wilhelm friedemann bach may have watched the opera's first performance. on the next day, bach performed on the organ. hasse might have watched bach play the organ. carl philipp emanuel bach said that his father and hasse were good friends.