The United States Constitution is supreme law in the United States of America. The Constitution originally comprised seven articles and defined the framework of national government. The first three articles of the Constitution embody the doctrine that the federal government can be divided into three branches, namely the legislative, the executive and the judicial. The concepts of federalism are embodied in Articles IV, V, and VI, which describe the rights and responsibilities that state governments have with respect to the federal government. The second paragraph states that the Constitution was signed by delegates at the Constitutional Convention of Philadelphia, Pennsylvania on September 17,1787. George Washington was Virginia's only delegate to sign the Constitution. In 1791, the Bill of Rights was ratified. It consisted of ten amendments that guaranteed many civil liberties and rights. Virginia joined 11 other states in ratifying the Constitution in 1792. The Constitution was amended 27 times. The first ten amendments were ratified by the United States in 1791, and they guaranteed many civil liberties and rights. The amendments 11-27 included provisions relating to voting, apportionment and congressional pay. They also added provisions relating specifically to the powers of Congress, presidential succession, and other rights.