The historical heart of the Presidio, the Main Post marks the site of the original Spanish presidio established in 1776. This site served as a Spanish military base for 45 years, was under Mexican control for 25 years and, starting in 1846, was an important U.S. Army post for over 140 years. The Presidio's oldest existing buildings are found on the Main Post.
Did You Know?
The modern-day Officers' Club was part of the original Spanish Presidio. In the front section of the building, excavations have uncovered adobe walls dating from the 1790's.