The great city of Philadelphia was founded in 1682 by William Penn to serve as the capital of Pennsylvania. It briefly became the capital of the United States while Washington DC was being built. It’s one of America’s oldest and most historically important cities, instrumental in the American Revolution where the Founding Fathers met, signed the Declaration of Independence (1776) and later the Constitution (1787). With notable firsts including the first US library, the first zoo and the first children-oriented museum, Philadelphia has the cachet of being part of the USA’s cultural and historical bedrock and also that of a pioneering city with its eye on the future. A holiday here will fire the imagination and give you a glimpse into what makes Americans tick.