A Tomb of the Unknown Soldier refers to a monument in dedication to the services of an unknown soldier and to the common memories of all soldiers killed in any war. Such tombs can be found in many nations and are usually high-profile national monuments. Throughout history, many soldiers have died in war with their remains being unidentified. Following World War I, a movement arose to commemorate these soldiers with a single tomb, containing the body of one such unidentified soldier.(Wikipedia)
"Tomb of the unknown soldier"
"The Tomb of the Unknown Soldier"