The Kroll Opera House in Berlin, Germany, was in the Tiergarten district on the western edge of the Königsplatz square, facing the Reichstag building. It was built in 1844 as an entertainment venue for the restaurant owner Joseph Kroll, and redeveloped as an opera house in 1851. It also served as the assembly hall of the Reichstag from 1933 to 1942. Severely damaged by the bombing of Berlin in World War II and the Battle of Berlin, it was demolished in 1951.

Tiergarten is a locality within the borough of Mitte, in central Berlin (Germany). Notable for the great and homonymous urban park, before German reunification, it was a part of West Berlin. Until Berlin's 2001 administrative reform, Tiergarten was also the name of a borough (Bezirk), consisting of the current locality (Ortsteil) of Tiergarten plus Hansaviertel and Moabit. A new system of road and rail tunnels runs under the park towards Berlin's main station in nearby Moabit.