Monterey State Historic Park is a historic state park in Monterey, California. It includes part or all of the Monterey Old Town Historic District, a historic district that includes 17 contributing buildings and was declared a National Historic Landmark in 1970. The grounds include California's first theatre, and the Monterey Customs House, where the American flag was first raised over California.
The park is a group of restored historic buildings: the Custom House, the Cooper-Molera Adobe Complex, the Larkin House, California's First Brick House, Colton Hall (City Hall of Monterey), Old Whaling Company, the Stevenson House, the First Theater, the Pacific House Museum, the Interpretive House, Casa del Oro, and Casa Soberanes. These houses display the cultural diversity that guided California's transition from a remote Spanish outpost in Las Californias province, to an agricultural Mexican Alta California territory, to U.S statehood. These influential adobe houses made up California's earliest capital and were the site of the state's first constitutional convention.
Today the historic buildings retain their rich heritage, preserving an important part of Californian as well as Spanish, Mexican, and American history. Added to the adobe houses is the park's Interpretive Center and the Pacific House Museum. The park provides tours of the historic houses and museums for the general public. The 'Secret Gardens of Old Monterey' are part of the open air museum for visitors.