The document summarizes available office space for lease in a historic landmark building located at 550 Montgomery Street in San Francisco. Suites range in size from 1,431 square feet to 13,123 square feet across floors 3 through 11. The building dates back to 1908 and was originally the headquarters for the Bank of Italy. It features restored original architectural details and high ceilings. The prime downtown location is near the Transamerica Pyramid with convenient access to the surrounding financial district.