Manila, officially the City of Manila, is the capital of the Philippines and the second largest city by population after Quezon City. Founded on June 24, 1571, by Spanish conquistador Miguel López de Legazpi, it is one of the oldest cities in the Philippines and was the seat of power for most of the countrys colonial rulers. It is situated on the eastern shore of Manila Bay and is home to many landmarks, some of which date back to the 16th century. It was the first chartered City by virtue of the Philippine Commission Act 183 on July 31, 1901 and gained autonomy with the passage of Republic Act No. 409 or the "Revised Charter of the City of Manila" on June 18, 1949. In 2012, the Globalization and World Cities Research Network listed Manila as a global city. The city proper is home to people in, and is the historic core of a built-up area that extends well beyond its administrative limits. The term "Manila" is commonly used to refer to the whole metropolitan area, the greater metropolitan area or the city proper. The officially-defined metropolitan area called Metro Manila, the capital region of the Philippines, includes the much larger Quezon City and the Makati Central Business District. It is the most populous region of the country, one of the most populous urban areas in the world, and is one of the wealthiest regions in Southeast Asia. Manila is also the most densely populated city proper in the world, with 41,515 people per square kilometer. Manila is located at the mouth of the Pasig River, on the eastern shore of the Manila Bay on one of the finest harbors in the country. The city is composed of 16 districts: Binondo, Ermita, Intramuros, Malate, Paco, Pandacan, Port Area, Quiapo, Sampaloc, San Andres, San Miguel, San Nicolas, Santa Ana, Santa Cruz, Santa Mesa and Tondo. The city has six congressional districts that represents it on the Lower House of the Philippine Congress.