Where was the United States Constitution signed in 1787, a milestone before America250?

The United States Constitution was signed at Independence Hall in Philadelphia in 1787.

The building was then known as the Pennsylvania State House. It had already hosted the Second Continental Congress and the adoption of the Declaration of Independence in 1776, making it a central site in the founding history remembered by America250.

The Constitutional Convention met there during the summer of 1787. On September 17, delegates endorsed the Constitution, which created a new federal framework to replace the Articles of Confederation. George Washington, president of the convention, signed first.

Thirty-nine delegates signed the final document. Rhode Island did not send delegates to the convention, and three participating delegates declined to sign. Independence Hall received its present name later, reflecting the building's connection to both the Declaration and the Constitution.