San Juan Bautista was founded on June 24, 1797. This mission sits on the edge of the only remaining Spanish Plaza in California. Mission San Juan Bautista’s historic church (built in 1812), well-landscaped grounds and setting, offer a unique opportunity to see and appreciate the California of two centuries ago. An active Roman Catholic Church since 1797, now under the Roman Catholic Diocese of Monterey. The existing adobe church has seen continuous use since 1812.