Description

From the 1930s to 1960s, maximum security Alcatraz Federal Penitentiary housed some of the most dangerous felons. Alcatraz is one of San Francisco's most popular tourist attractions and a National Historic Landmark. After 20 years of planning, the old cell house and auxiliary elements were finally rehabilitated and preserved according to historic guidelines. The column-like west-facing pilasters were rebuilt with new steel rods and recast concrete. Deteriorating concrete and metal were removed or repaired and concrete beams were surreptitiously added to strengthen the ceiling.