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The United States Military built the fortress on the island beginning around 1854. The island was later turned into a military prison, and in 1912 the prison building was built. The island was later taken over by the federal government in 1934.

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12y ago
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11y ago

found in 1775 by spanish explorer Juan Manuel de Ayala alcatraz was discovered but was named Isla de loss tracelca a meaning island

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12y ago

frank lee Morris

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Q: Who was the founder of Alcatraz prison?
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