Philadelphia, the City of Brotherly Love, is the place where you could say the United States was born. In 1776 representatives from the 13 original American Colonies signed the Declaration of Independence in Independence Hall and the rest is history. The city was founded by William Penn, a Quaker, in the 1600s. It mostly consisted of the area from the Delaware river to city hall in these earlier times. That area forms the historical district today and the area where visitors to the city focus most of their attention.