A women's suffrage amendment was first introduced in Congress in 1878. Forty-one years later, on June 4, 1919, Congress approved the women’s suffrage amendment and sent it to the states for ratification. Soon thereafter, 17 states had ratified it, but suffragists still needed another 19 states to approve. Finally, Tennessee became the 36th state to ratify the Amendment. On August 26th, 1920, Secretary of State Bainbridge Colby signed the Amendment into law.
Since ratification in 1788, more than 11,000 amendments have been proposed, though the Constitution has been amended only 27 times, most recently in 1992.
Article V of the United States Constitution outlines basic procedures for constitutional amendment. One method—the one used for every amendment so far—is that Congress proposes an amendment to the states; the states must then decide whether to ratify the amendment. But in order for Congress to propose an amendment, two-thirds of each House of Congress must vote for it. And then three-quarters of the states must ratify the amendment before it is added to the Constitution.
The Bill of Rights is the name given to the first ten amendments to the Constitution. The amendments, which were intended to expand the Constitution's protection of individual liberties, were written by James Madison and ratified by the states in 1791. The full text of the Bill of Rights can be viewed here, more information about the Bill of Rights can be found on the National Archives web page.
An amendment to the Constitution is an improvement, a correction or a revision to the original content approved in 1788. To date, 27 Amendments have been approved, six have been disapproved and thousands have been discussed.