The United States Constitution was in 1787 in Philadelphia, Pennsylvania. Delegates from 12 states (excluding Rhode Island) met at Independence Hall for the purposes of the Articles of Confederation. At the , the decided to write a new Constitution, was completed on September 17, 1787 after a was reached on the of representation between small states and large states. The delegates agreed that the Constitution would become law once it was by nine states. New Hampshire became the state to on June 21, 1788. On December 15, 1791, a Bill of Rights (the first ten amendments) was added to the Constitution.