Info from Wikipedia
Große Freiheit 36 is a music club on Große Freiheit street in Hamburg's St. Pauli district. The Kaiserkeller is in its basement.
Bruno Koschmider opened the Kaiserkeller in October 1959 at Große Freiheit 36 with place for 550 guests (not seated). On 19 September 1985 the music club opened under the current name Große Freiheit 36 with a concert by the blues guitarist Rory Gallagher. One year later, the Kaiserkeller reopened, and a Café was set up in the upper level.