when was the us constitution written and ratified
The Constitution of the United States: Fast Facts. 1  The U. S Constitution was written in the same Pennsylvania State House where the Declaration of Independence was signed and where George Washington received his commission as Commander of the Continental Army. 2  Written in 1787, the Constitution was signed on September 17. But it wasnât until 1788 that it was ratified by the necessary nine states. The U.S. Constitution was prepared in secret, behind locked doors that were guarded by sentries.