Sarcophagus Offering The Unknown Soldier from World War I lies in the crypt covered by a white marble sarcophagus. The first unknown to be laid to rest at the Tomb, he was interred on Nov. 11, 1921. SHARE: Download: Full Size (1.99 MB) Credit: Army Pvt. Lane Hiser VIRIN: 170903-A-EI292-180.JPG Photo Gallery