Today, we are highlighting our content in celebration of Constitution Day. We have curated a wonderful collection of materials from across our collections. Explore these rich resources to learn more about one of America’s most important document.

On September 17, 1787, the final draft of the Constitution was signed by 39 delegates. The document was then sent to the states for ratification, and went into effect on June 21, 1788 when New Hampshire became the ninth state to ratify the Constitution.