Columbus Tower - San Fransisco (Explore on Aug 4, 2025)

Also known as Sentinel Building, it was designed by Salfield and Kohlberg, is a flatiron building clad in white tile and copper. Construction was begun before the 1906 Earthquake and Fire. The framing survived the disaster, and the building was completed in 1907. The top floor housed the real estate brokerage of Political boss Abe Ruef after his release from San Quentin State Prison on charges of graft.

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