Independence National Historic Park is in the oldest part of Philadelphia. Most of the buildings from the time when American was fighting for its freedom are there. Independence Hall is where the Declaration of Independence and the Constitution of the United States were written. Nearby is a building where the Liberty Bell is kept. In the same neighborhood, there are many houses dating from the days of the American Revolution. Elfreth's Alley is one of the oldest streets in the United States. Christ Church is the church where many famous early Americans worshipped.