United States Constitution Page one of the original copy of the Constitution Jurisdiction All States and Territories Created September 17, 1787 Presented September 28, 1787 Ratified June 21, 1788 Date effective June 21, 1788 System Constitutional Republic Branches Chambers Bicameral Executive President Judiciary Supreme, Circuits, Districts Federalism Federation Electoral college Yes Entrenchments 2, 1 still active First Legislature March 4, 1789 First Executive April 30, 1789 First court February 2, 1790 Amendments 27 Last Amended May 5, 1992 Location National Archives, Washington, D.C. Commissioned by Confederation Congress Author (s) Philadelphia Convention Signatories 39 of the 55 delegates Media type Parchment Supersedes Articles of Confederation
when was the constitution of the united states created
September 17, 1787