Alcatraz Federal Penitentiary terraced garden and greenhouse. The mansion had tall windows, providing fine views of San Francisco Bay. Today, the house is a ruin, burned down by Native Americans during the Occupation of Alcatraz on June 1, 1970. Building 64 Residential Apartments was the first building constructed on the island of Alcatraz, intended entirely for the purpose of accommodating the military officers and their families living on the island. Located next to the dock on the southeastern side of the island, below the Warden's House, the three-story apartment block was built in 1905 on the site of a U.S. Army barracks which
Alcatraz Island 1906 San Francisco earthquake, civilian prisoners were transferred to Alcatraz for safe confinement. On March 21, 1907, Alcatraz was officially designated as the Western U.S. Military Prison, later Pacific Branch, U.S. Disciplinary Barracks, 1915. In 1909 construction began on the huge concrete main cell block, designed by Major Reuben Turner, which remains the island's dominant feature. It was completed in 1912. To accommodate the new cell block, the Citadel, a three-story barracks, was demolished down to the first floor, which was actually below ground level. The building had been constructed in an excavated pit (creating a dry "moat") to enhance