This extensively remodeled structure was part of the original adobe fort erected by the Spanish. Adobe walls dating back to the early 1790s are incorporated into the front wings of what evolved into the Officers' Club of the early 1900s. In the 1930s the building was remodeled into a graceful Spanish Colonial Revival style structure with rustic Spanish-tile gable roofs, heavy, rough timber lintels and beams, and decorative ironwork. Today the Officers' Club temporarily houses the Natioanl Park Service visitor center and hosts traveling cultural exhibits. The Presidio Trust also rents rooms for special events.