Philadelphia is famously known for the signing of the U.S. Constitution in 1787. The Constitutional Convention took place there, where delegates from twelve states met to draft a new governing document to replace the Articles of Confederation. The meeting was held at Independence Hall, a significant location for American independence, having hosted the Continental Congress and the signing of the Declaration of Independence. The Constitution established the framework for the federal government and outlined the separation of powers among branches. Its signing marked a pivotal moment in American history, fostering a stronger centralized government.