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
Alcatraz Island in popular culture a makeshift task force to track down the inmates and prevent them from committing further crimes while also determining the reasons for their return. Alcatraz's isolated and fortified image has meant that it has been used as a location for fictional hostage scenarios in various instances. A number of books were written or co-authored by former Alcatraz prisoners, e.g.: "Island in the Sun", the band's debut single from 1983, makes multiple lyrical references to Alcatraz Island. Alcatraz Island in popular culture Alcatraz Island has appeared many times in popular culture. Its appeal as a picturesque film setting derives from its