U.S. Constitution signed | September 17, 1787 | HISTORY

The Constitution of the United States of America is signed by 39 delegates present at the conclusion of the Constitutional Convention in Philadelphia. Supporters of the document waged a hard-won battle to win ratification by the necessary nine out of 13 U.S. states.

On May 25, 1787, delegates representing every state except Rhode Island convened at Philadelphia’s Pennsylvania State House for the Constitutional Convention. The building, which is now known as Independence Hall, had earlier seen the drafting of the Declaration of Independence and the signing of the Articles of Confederation. The assembly immediately discarded the idea of amending the Articles of Confederation and set about drawing up a new scheme of government. Revolutionary War hero George Washington, a delegate from Virginia, was elected convention president.