Behind the Tomb of the Unknown Soldier lies the Memorial Amphitheater. Arlington National Cemetery’s Memorial Amphitheater was dedicated on May 15, 1920. While Memorial Day ceremonies are held throughout the United States, many consider the services at Memorial Amphitheater to be the nation’s official ceremony honoring American service members. The president of the United States traditionally gives an address during Memorial Day ceremonies at the amphitheater. A copper box placed in the cornerstone contains copies of the Bible, the Declaration of Independence and the Constitution; a U.S. flag; designs and plans for the amphitheater; a map of Pierre Charles L’Enfant’s design for Washington, D.C.; one of each U.S. coin and postage stamp in use in 1915; an autographed photo of President Woodrow Wilson; and other documents pertaining to the history of the amphitheater and the nation’s capital.

Behind the Tomb of the Unknown Soldier lies the Memorial Amphitheater. Arlington National Cemetery's Memorial Amphitheater was dedicated on May 15, 1920. While Memorial Day ceremonies are held throughout the United States, many consider the services at Memorial Amphitheater to be the nation's official ceremony honoring American service members. The president of the United States traditionally gives an address during Memorial Day ceremonies at the amphitheater. A copper box placed in the cornerstone contains copies of the Bible, the Declaration of Independence and the Constitution; a U.S. flag; designs and plans for the amphitheater; a map of Pierre Charles L'Enfant's design for Washington, D.C.; one of each U.S. coin and postage stamp in use in 1915; an autographed photo of President Woodrow Wilson; and other documents pertaining to the history of the amphitheater and the nation's capital.