The barren island came to be called “The Rock,” though the word “alcatraces” is Spanish for “cormorant.” The water birds on the island reminded early Spanish explorers of the cormorants in Spain.
The island was used as a fort and prison during the U.S. Civil War, then as a military prison for those serving long sentences.
On July 1, 1934, it became a U.S. penitentiary, and housed only the most violent criminals, such as the notorious Al Capone and “Machine Gun” Kelly.
Alcatraz Penitentiary was closed in 1963 when it became too expensive to maintain.
