Another important event of this period is Beethoven’s grand " Academy " during which Symphony No. 9 and three movements of the Missa solemnis were first performed. The " Academy " took place on May 7th 1824 at the Karntnertor Theater and it was repeated on May 23rd in the great hall of the Fort. The conductor was Umlauf; at the beginning of every part, Beethoven, who sat by the stage, gave the tempos. The success was smashing. Despite the obvious negligence of the interpreters who had been gathered in a rush, Beethoven’s compositions left a memorable impression on his audience. The soprano and alto parts were interpreted by two famous young singers: Henriette Sonntag and Caroline Unger.