details of the interior passages of the bent pyramid of king sneferu, a unique example of early

2023 ancient antique bat bent burial cairo ceiling chamber cheops corbel dahshur desert details development early editorial egypt egyptian focus giza heritage history illustrative interior january khafree khufu king kingdom limestome limestone madse monument mortuary necropolis north old passage passages pharaoh pyramid pyramids red reddish retro rock ruin rusty sand selective sinfro sneferu stone temple tomb tourism travel tura unesco unique vault vintage world