The building at 1100 Broadway Building was built in 1911 as for the Security Bank. It later served as the headquarters of the Key System,, which operated Oakland's public transportation system for many years. The main Oakland office of the Bank of Italy was located here from 1917 to 1929.

Designed by Frederick Meyer and Walter Reed and built in 1911, the building has the same U-shaped floor as many of Meyer's earlier San Francisco office buildings. The building combines Renaissance Revival and Baroque elements and is notable for its spectacular terra cotta detailing.

Frederick Meyer was a prominent San Francisco architect of the early 20th century. He was known for numerous office buildings in downtown San Francisco, including the Bankers Investment Building (1912), Kohler and Chase Building (1909), Physicians Building (1914), Humboldt Bank Building (1906) and the Monadnock Building (1906).