Tomb of the Unknown Soldier (Arlington National Cemetery)

The Tomb of the Unknown Soldier at Arlington National Cemetery in Arlington County, Virginia, United States is the burial site (and the white, marble sarcophagus above it) of a World War I soldier whose remains were unidentifiable. After a design competition was held in 1928, the winning project was completed in 1932. The site now also includes the gravesites of two other unknown soldiers, one from World War II and one from the Korean War, who were buried beneath two slabs between the tomb and the Memorial Amphitheater behind it. Other nations also have national burial sites for unknowns from the First World War (also known as the Great War), such as the United Kingdom, France, Canada, Portugal, and Italy. The Tomb of the Unknown Warrior is in the United Kingdom and the Tomb of the Unknown Soldier is in France. Nations have presented their highest awards or medals to each other's unknown soldier. The World War I "Unknown" is a recipient of the Medal of Honor, the Victoria Cross, and several other foreign nations' highest service awards. The U . Unknowns from World War II and Korea have also received the Medal of Honor. The Tomb is guarded around-the-clock by a Tomb Guard from the U . Army's 3rd Infantry Regiment, "The Old Guard". An elaborate ceremony, the Changing of the Guard, takes place every half-hour from April through September and hourly from October through March.