Mills Building and Tower

The Mills Building is a survivor of early skyscraper history in San Francisco. When it was completed in 1892, its steel frame construction represented a revolutionary approach to architecture, marking it as one of the city's first true high-rises. It stands as the last remaining example of the Chicago School architectural style in the city, a testament to the period when architects began experimenting with steel skeletons rather than thick, heavy masonry walls to support a building's height.