The National Constitution Center serves as America's leading platform for constitutional education and debate. There have been 27 amendments to the Constitution, beginning with the Bill of Rights, the first 10 amendments, ratified December 15, 1791.The age at which a citizen is entitled to vote was changed from 21 to 18 years of age. Use Spotlight PA's exclusive amendment tracker to see all of the proposed changes to the state constitution and where they stand in the process. The Congress, whenever two thirds of both Houses shall deem it necessary, shall propose Amendments to this Constitution. The purpose of the ballot question is to amend the Pennsylvania Constitution to abolish the Traffic. Court in the City of Philadelphia. In Philadelphia, in the State House where the Declaration of Independence was signed. First Amendment Explained: Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof. Amendment Review: 27 Amendments in 27 Minutes (All Levels).