Sarcophagus

A sarcophagus (plural sarcophagi) was a type of fancy coffin used by the ancient Egyptians.

The stylised technology of the Osirian lodestone had the appearance of an ancient Egyptian coffin. There were also others that stored the Osirian service robot, who appeared as mummies. (DW: Pyramids of Mars)

The Monk's TARDIS appeared as a sarcophagus in an English church of 1066. (DW: The Time Meddler)