Designed by Major Reuben B. Turner, the Alcatraz cell house was the world's largest concrete-reinforced building when it was completed in 1912. With central steam heat, skylights and electric lights, it was considered a very modern place. When the Bureau of Prisons took over, they made it more escape-proof with tool-proof steel bars and gun galleries at the ends of the building.
Click Next to See a prisoner's cell