On December 12, 1787.
Pennsylvania
In 1788.
The US Constitution was ratified on June 21, 1788.
1788
The US Constitution was ratified on June 21, 1788.
it was written in the Pennsylvania state house in the year 1787.
It was ratified in July 28, 1868.
1811
1788.
1820
The U.S. Constitution was drafted in 1787. Eleven state legislatures ratified it in 1787 or 1788, and all thirteen had done so by 1790.
1789