Timeline of drafting and ratification of the United States Constitution Timeline of drafting and ratification of the United States Constitution The drafting of the Constitution of the United States began on May 25, 1787, when the Constitutional Convention met for the first time with a quorum at the Pennsylvania State House (now Independence Hall) in Philadelphia, Pennsylvania to revise the Articles of Confederation, and ended on September 17, 1787, the day the Constitution drafted by the convention's delegates to replace the Articles was adopted and signed. The ratification process for the Constitution began that day, and ended when the final state, Rhode Island, ratified it on May 29, 1790. In
History of the United States Constitution Bureau of Standards to protect from atmosphere, insects, mold and light, the parchments were re-encased with special light filters, inert helium gas and proper humidity. They were transferred to the National Archives in 1952. Since 1952, the "Charters of Freedom" have been displayed in the Rotunda of the National Archives Building. Visual inspections have been enhanced by electronic imaging. Changes in the cases led to removal from their cases July 2001, preservation treatment by conservators, and installment in new encasements for public display in September 2003. History of the United States Constitution The United States Constitution was written in 1787