Presidio - Main Post

Montgomery Street at Sheridan Ave., San Francisco, CA
Presidio - Main Post Website
City, Park
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The Main Post --the heart of the Presidio--marks the site of a Spanish garrison established here in 1776. This historic site served as a Spanish military base for forty-five years, fell under Mexican control for twenty-five 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.