Jackson Square Historic District is one of the oldest commercial neighborhoods in San Francisco . Buildings on Jackson between Montgomery and Sansome retain cast iron shutters as protection against fire , but when the city burned , in one case , a warehouse 's contents turned out to be more significant in saving the building in the 1906 earthquake and fire : For decades this was the interior designer 's district ( predating the San Francisco Design Center )
1906 earthquake and fire
1906 San Francisco earthquake
Jackson Square, San Francisco