National Register #77000334
Mills Building and Mills Tower
220 Montgomery Street/220 Bush Street
Financial District
Built 1890, 1907, 1931
This building in the style of the Chicago School was built
by the architectural firm of Burnham & Root.
The 1890 building was the first steel frame building in San Francisco,
and for many years, it was one of the tallest buildings in the city.
The structure was seriously damaged by the 1906 Earthquake and Fire
but was soon rebuilt and enlarged with Willis Polk as the chief architect.
Mr. Polk designed further extensions to the building in 1914 and 1918.
The 22-story Mills Tower, erected in 1931, was designed by Lewis Hobart.
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