San Francisco and its famous bay, originally inhabited by native Americans, became a possession of Mexico in the 18th century. In 1848, at the end of the Mexican-American War and the execution of the Treaty of Guadalupe Hidalgo, California became part of America, and two years later, a state.

San Francisco’s Presidio, steeped in American history, was named a National Historic Landmark in 1962. The military complex, housing more than 700 buildings, 433 of which are designated historic, closed in 1989 and, in 1994, the National Park Service took over its operation.