A sarcophagus (plural sarcophagi), or mummy case, was a type of coffin used by the ancient Egyptians.
The stylised technology of the Osiran lodestone had the appearance of an ancient Egyptian coffin. There were also others that stored the Osiran service robot, who appeared as mummies. (TV: Pyramids of Mars)
The Monk's TARDIS appeared as a sarcophagus in a monastery in Northumbria in 1066. (TV: The Time Meddler)
A sarcophagus with an electronic lock was stored on board the space-faring version of the Orient Express as a means of capturing a mummy known as the Foretold. However, it was never put to use beyond accidentally being opened by feedback from the Twelfth Doctor's sonic screwdriver, as he later found away to help the Foretold pass on when alien technology kept his body from dissolving until it registered that a long-ended war was over. (TV: Mummy on the Orient Express)
Anwar Nazir, the leader of the Cult of the Black Pyramid, journeyed to the resting place of Horus to awaken the ancient being. However, he discovered that Horus had died after a failure in his sarcophagus's life support system. (PROSE: Scarab of Death)
The Ice Warrior Queen would have a sarcophagus to hibernate. (TV: Empress of Mars)
Other realities[]
In one of the infinite parallel universes of "possible space", (COMIC: Fire and Brimstone) the last clue left behind on Gallifrey by Ulysses as to his whereabouts led his son the Doctor to a sarcophagus kept in the Cairo Museum in 1994, which was allegedly that of Pharaoh Cheops. Ulysses's face was painted on the sarcophagus, and when they opened it, it was empty, save for a note written in Gallifreyan from Ulysses to the Doctor. This led the Doctor and Barusa to believe that the historical figure of "Cheops" had merely been an identity temporarily assumed by the Time Lord, who had subsequently faked his death and left ancient Egypt. (PROSE: The Chronicles of Doctor Who?)
