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An Egyptian archeologist walks next to a tomb at the Serapeum of Saqqara, a vast underground necropolis south of Cairo dedicated to the bulls of Apis, as it reopens to the public after 11 years of renovation. The Serapeum, whose origin dates back to around 1400 BC, was discovered in 1851 by French Egyptologist Auguste Mariette, founder of the first department of Egyptian antiquities. The site contains huge subterranean galleries in which are contained the large tombs of some 30 sacred bulls, accompanied by steles bearing inscriptions providing information on the reigns under which the animals lived. (Khaled Desouki/GettyImages)