William Penn founded the city of Philadelphia in 1682 as a Quaker settlement.

Philadelphia was the largest city in Colonial America.

By 1774, Philadelphia had become the economic and political center of the American colonies.

Also in 1774, Philadelphia philanthropists formed the first Anti-Slavery Society.

The First Continental Congress and Second Continental Congresses were conducted in Philadelphia.

Both the Declaration of Independence and the Constitution of the United States were adapted and signed in Philadelphia, which is why it is known as the "birthplace of the United States".

Philadelphia served as the United States capital from 1790-1800, when the new city of Washington, D.C. became the capital.

The word "philadelphia" means brotherly love in Greek, which is why Philadelphia is nicknamed the "City of Brotherly Love."