Independence Hall hosted both the adoption of the Declaration of Independence and the Constitutional Convention in Philadelphia.
The building was originally called the Pennsylvania State House. The Second Continental Congress met there when it adopted the Declaration of Independence on July 4, 1776. Delegates did not generally call it Independence Hall at the time; the later name reflects its association with the founding of the United States.
From May 25 through September 17, 1787, the building hosted the Constitutional Convention. Delegates debated and approved the United States Constitution there, although the document still required ratification by the states before taking effect.
Independence Hall is part of Independence National Historical Park. It became a UNESCO World Heritage Site in 1979. The building is sometimes confused with Carpenters’ Hall, where the First Continental Congress met in 1774, but the two sites are separate Philadelphia landmarks.