Signing of the U.S. Constitution

Date: September 17, 1787 • Location: Center City, United States

The United States Constitution is signed at Independence Hall in Philadelphia, bringing the Constitutional Convention to an end.

The Constitution of the United States is the supreme law of the United States of America. It superseded the Articles of Confederation, the nation's first constitution, on March 4, 1789. Originally including seven articles, the Constitution defined the foundational structure of the federal government.