Burial 116 is the tomb of Jasaw Chan K 'awiil I. It is a large vaulted chamber deep within the pyramid , below the level of the Great Plaza . The tomb contained rich offerings of jadeite , ceramics , shell and works of art . The body of the king was covered with large quantities of jade ornaments including an enormous necklace with especially large beads , as depicted in sculpted portraits of the king . One of the outstanding pieces recovered from the tomb was an ornate jade mosaic vessel with the lid bearing a sculpted portrait of the king himself .