This building was built in 1753 as the Pennsylvania Statehouse. It was the main meeting place of the Second Continental Congress from 1775 to 1781 and the site of the Constitutional Convention, during which the Constitution of the United States was ratified on June 21, 1788 (adopted on September 17, 1787, entered into force on March 4, 1789) - the highest legal act in force in the United States, the basis of the legal system and political system. The US Constitution is often considered the first constitution in the world (the Constitution of Corsica of 1755 is earlier than it).
This historic civic building in Philadelphia is now the centerpiece of Independence National Historical Park.
In 1966, Independence Hall was added to the National Register of Historic Places, and in 1979, it was added to the UNESCO World Heritage List.
