PHILADELPHIA - If you have ever wondered how the founding fathers spent time in Philadelphia, it's best to start by visiting Independence Hall and the National Park Service. The National Park Service operates Independence Hall and Independence National Historic Park, as well as the Graff House, which was demolished after Jefferson's death in 1792. The Graff House also featured a short film about the Declaration of Independence and period pieces. A few centuries later, you can visit the Jefferson House itself.

PHILADELPHIA - There's more to the life and legacy of Benjamin Franklin than just his achievements. Philadelphia is home to several historical sites and attractions. In April 2006, an exhibit devoted to the famous American mathematician, writer, and philosopher opened in Philadelphia. This exhibit titled Benjamin Franklin: In Search of a Better World also featured a series of complimentary events.

PHILADELPHIA - Many ask, "How and When did the Liberty Bell crack?" The National Park Service explains that the crack was caused by more than 90 years of use and the bell's metallic composition. But what caused the crack? And how can we know? The researchers at Winterthur Museum believe that the high tin content contributed to the cracking. The cracks were not visible to the naked eye but were noticed by researchers when the bell was hung.

PHILADELPHIA - Did you know that the Declaration of Independence was signed in Philadelphia? If not, you are missing out on a very important history lesson. You can read about how it was written here. Jefferson is credited with being the principal author of the document. It affirms the July 2 decision of Congress to break away from Great Britain. Although the document's language may be stirring, not all Americans, males or white, can agree with the sentiments expressed within. The 2nd Continental Congress wrote it.

PHILADELPHIA - Having signed the U.S. Constitution in Philadelphia, James Madison and the other founding fathers debated the Constitution and its amendments. In Philadelphia, delegates from New Jersey, Delaware, and Maryland could hear and debate the proposals. Some delegates could not attend because they were in London or France or because they were too busy pursuing local affairs. Regardless of their reasons, it is obvious that they had serious disagreements over the U.S. Constitution.

PHILADELPHIA - The United States Constitution was ratified on December 7, 1787, by five states: Pennsylvania, Georgia, Connecticut, and Massachusetts. Other states opposed the document because it did not safeguard their basic political rights. All fifty states eventually ratified the Constitution, except for the District of Columbia. It was drafted by James Madison, who subsequently served as President of the United States from 1789 to 1794.