Manila (/məˈnɪlə/; Tagalog: Maynilà, pronounced [majˈnilaʔ], officially the City of Manila (Tagalog: Lungsod ng Maynilà [luŋˈsod nɐŋ majˈnilaʔ]), is the capital of the Philippines and a highly urbanized city. It is the most densely populated city proper in the world as of 2018. 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. Manila, alongside Mexico City and Madrid are considered the world's original set of Global Cities due to Manila's commercial networks being the first to traverse the Pacific Ocean, thus connecting Asia with the Spanish Americas, marking the first time in world history when an uninterrupted chain of trade routes circled the planet. Manila is also the second most natural disaster-afflicted capital city in the world next to Tokyo, yet it is simultaneously among the most populous and fastest growing cities in Southeast Asia. The Spanish city of Manila was founded on June 24, 1571, by Spanish conquistador Miguel López de Legazpi. The date is regarded as the city's official founding date; however, a settlement has already existed dating back as far as 1258. Manila was also the seat of power for most of the country's colonial rulers. It is home to many historic sites, some of which were built during the 16th century. Manila has many of the Philippines' firsts, including the first university (1590), light station (1642), lighthouse tower (1846), water system (1878), hotel (1889), electricity (1895), oceanarium (1913), stock exchange (1927), flyover (1930s), zoo (1959), pedestrian underpass (1960), science high school (1963), city-run university (1965), city-run hospital (1969), and rapid transit system (1984; also considered as the first rapid transit system in Southeast Asia). 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. The city proper is home to 1,780,148 people in 2015, and is the historic core of a built-up area that extends well beyond its administrative limits. With 71,263 people per square kilometer, Manila is also the most densely populated city proper in the world. The city is located on the eastern shores of Manila Bay. The Pasig River flows through the middle of the city, dividing it into the north and south sections. Manila is made up of 16 administrative 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, while it is divided into six districts for its representation in Congress and the election of the city council members. In 2016, the Globalization and World Cities Research Network listed Manila as an "Alpha - "global city, while the Global Financial Centres Index ranks Manila 97th in the world.