The Monterey Peninsula is located on the central California coast and comprises the cities of Monterey, Carmel, and Pacific Grove, and unincorporated areas of Monterey County including the resort and community of Pebble Beach.
Monterey was founded in 1770 by missionary Junípero Serra and explorer Gaspar de Portolà. Portolà erected the Presidio of Monterey to defend the port against an expected Russian trading and settlement invasion.
At the same time, Serra founded Mission San Carlos Borromeo, second in the chain of Spanish Missions of California. Originally near the presidio, the mission later moved a few miles south to its current location in Carmel.
Monterey served as the capital of upper Las Californias and Alta California from 1777 to 1848, under the flags of Spain, independent Mexico, and the United States. The city was originally the only port of entry for taxable goods in California. All shipments into California by sea were required to go through the Custom House, the oldest governmental building in the state, and California's Historic Landmark Number One. Built in 3 phases, construction on the Custom House began in 1814 under the Spanish, the center section under Mexican rule in 1827, with the lower end completed by the United States in 1846. Monterey was also the site of the July 7, 1846, Battle of Monterey during the Mexican-American War. It was on this date that John D. Sloat, Commodore in the United States Navy, raised the U.S. flag over the Monterey Custom House and claimed California for the United States.