The Bendlerblock is a building complex in the Tiergarten district of Berlin, Germany, located on Stauffenbergstraße (formerly named Bendlerstraße). Erected in 1914 as headquarters of several Imperial German Navy (Kaiserliche Marine) offices, it served the Ministry of the Reichswehr after World War I. Significantly enlarged under Nazi rule, it was used by several departments of the Oberkommando der Wehrmacht (OKW) from 1938, especially the Oberkommando des Heeres and the Abwehr intelligence agency.