 By 1750 around 50 musicians were in Frederick's employment.The principal occasions at which music was played at the court included the daily soirées in which Frederick used to play the flute, and the concerts in the residence of the King's mother, Sophia Dorothea of Hanover at which Frederick's Kapelle had to perform as well.In addition to these regular events, the Kapelle also had to perform in the opera performances during Lent.