Philadelphia

Philadelphia, colloquially referred to as Philly, is the most populous city in the U.S. state of Pennsylvania[11] and the sixth-most populous city in the nation, with a population of 1,603,797 in the 2020 census. The city is the urban core of the larger Delaware Valley, also known as the Philadelphia metropolitan area, the nation's seventh-largest and one of the world's largest metropolitan regions with 6.245 million residents in its metropolitan statistical area and 7.366 million residents in its combined statistical area.[12] Philadelphia is known for its extensive contributions to United States history. The city served as the nation's capital until 1800.[13] It maintains contemporary influence in business and industry, culture, sports, and music.[14][15] Philadelphia was founded in 1682 by William Penn, an English Quaker and advocate of religious freedom. The city served as the capital of the Pennsylvania Colony during the British colonial era[3][16] and went on to play a historic and vital role as the central meeting place for the nation's founding fathers. Philadelphia hosted the First Continental Congress in 1774, preserved the Liberty Bell, and hosted the Second Continental Congress during which the founders signed the Declaration of Independence.[17] The U.S. Constitution was later ratified in Philadelphia at the Philadelphia Convention of 1787. Philadelphia remained the nation's largest city until 1790, served as the nation's first capital from May 10, 1775, until December 12, 1776, and on four subsequent occasions during and following the American Revolutionary War, including from 1790 to 1800 during the construction of the new national capital of Washington, D.C.