William & Mary educated U.S. Presidents Thomas Jefferson, James Monroe, and John Tyler as well as other key figures important to the development of the nation, including U.S. Supreme Court Chief Justice John Marshall, Speaker of the House Henry Clay, and 16 signers of the Declaration of Independence. W&M founded the Phi Beta Kappa academic honor society in 1776 and was the first school of higher education in the United States to install an honor code of conduct for students. The establishment of graduate programs in law and medicine in 1779 make it one of the first universities in the United States.