False door

A false door, or recessed niche, is an artistic representation of a door which does not function like a real door. They can be carved in a wall or painted on it. They are a common architectural element in the tombs of ancient Egypt, but appeared possibly earlier in some Pre-Nuragic Sardinian tombs known as Domus de Janas. Later they also occur in Etruscan tombs and in the time of ancient Rome they were used in the interiors of both houses and tombs.