The U.S. Custom House was listed in the National Register of Historic Places in 1975 . After the 1989 Loma Prieta earthquake , seismic and other upgrades were made from 1993 to 1997 . While the building continues to serve many of its original purposes , the U.S. Customs Service is now the U.S. Customs and Border Protection , part of the Department of Homeland Security
1989 Loma Prieta earthquake
1989 Loma Prieta earthquake
United States Customhouse (San Francisco)