The city of Philadelphia, also called Philly, is the largest city in the American state of Pennsylvania. It is located along the state's Southwestern border with New Jersey.
Philadelphia was founded in 1682 by William Penn to be the capital of the new colony that would become Pennsylvania. It was an important city in the history of the United States, being the meeting place for the Founding Fathers, as well as the capital of the new United States of America while the city of Washington was being built.
The city was named by William Penn as a symbol that this would be a place where his people (the Quakers) and the surrounding native peoples (the Lenape) could live together in peace. The name comes from Greek, and translates to 'brotherly love'.