The Port Authority of New York and New Jersey (PANYNJ) is a bi-state port district authority, established in 1921 (as the Port of New York Authority) through an interstate compact, that oversees much of the regional transportation infrastructure, including bridges, tunnels, airports, and seaports, within the Port of New York and New Jersey. This 1,500 square mile (3,900 km²) district is the region generally within 25 miles (40 km) of the Statue of Liberty in New York Harbor.