Former Military Chapel, Military chapel on Alcatraz Island, San Francisco, United States.

The Former Military Chapel (Bachelor Quarters) is a 1920s Mission Revival building next to the Sally Port and Dock and Building 64 on Alcatraz Island. Its ground floor held quarters for officers and their families; the top floor served as a school and chapel. In 1934 it became Bachelor Quarters for unmarried officers.

Built in the 1920s in Mission Revival style, the building housed officers' families on the ground floor, with a school and chapel on the top floor. In 1934, when Alcatraz became a federal penitentiary, it was converted into bachelor quarters for unmarried officers, and the chapel was no longer used for services.

The building's top floor served as both a school and a chapel for the children and families of officers at the military prison. After 1934, when Alcatraz became a federal penitentiary, the chapel was no longer used for services and the floor was converted into dormitory-style rooms for unmarried officers.

The building stands beside the Sally Port and Dock and next to Building 64, so it is passed on the way between the dock and the cellhouse. Its two floors are reached by stairs, and the upper level, once the school and chapel, is the part to look up for.

The building was erected in the 1920s in the Mission Revival style, and its top floor served as both a school and a chapel for officers' families. When Alcatraz became a federal penitentiary in 1934, the structure was reassigned as bachelor quarters for unmarried officers.