El Callao (; or ) is the chief seaport of
Peru. The city is also called
Provincia Constitucional (Constitutional Province), the only province of the
Callao Region. The Historic Centre of Callao is located west of
Historic Centre of Lima , the country's capital, and is part of the
Lima Metropolitan Area. Callao borders
Lima Province on the north, east and south, and the Pacific Ocean on the west.