Willis Polk designed the facade of the Hallidie Building as a glass curtain wall, perhaps the first American use of a construction technique that would dominate commercial architecture later in the century. According to architectural historians, the building was occupied in either 1917 or 1918¹.

The Hallidie Building is also National Register Listing #71000185.

Footnote 1:

The date 1917 is cited by National Trust Guide: San Francisco, published by John Wiley & Sons, Inc., 2000, and The Ultimate Guide: San Francisco, published by Chronicle Books, 1989.

The date 1918 is cited by Here Today: San Francisco's Architectural Heritage, published by Chronicle Books, 1968, and Landmarks of San Francisco, published by Harry N. Abrams, Inc., 1991.