Cathedral of San Carlos Borromeo (Monterey, California)

Royal Presidio Chapel
The Cathedral of San Carlos Borromeo from the northeast
Location in the Monterey Peninsula
Location550 Church Street, Monterey, California
Coordinates 36°35′44″N 121°53′25.5″W / 36.59556°N 121.890417°W / 36.59556; -121.890417
Area0.5 acres (0.20 ha)
Built1791-1794
Architectural styleSpanish Colonial
NRHP reference No.66000216
CHISL No.105
Significant dates
Added to NRHPOctober 15, 1966
Designated NHLOctober 9, 1960
Designated CHISL1933

The Cathedral of San Carlos Borromeo (Spanish: Catedral de San Carlos Borromeo), also known as the Royal Presidio Chapel, is a Catholic cathedral located in Monterey, California, United States. The cathedral is the oldest continuously operating parish and the oldest stone building in California. It was built in 1791-94 making it the oldest (and smallest) serving cathedral in the United States, along with St. Louis Cathedral in New Orleans, Louisiana. It is the only existing presidio chapel in California and the only existing building in the original Monterey Presidio.