Egyptian mummies more than 5,000 years old consist of hardly more than bones, skin, and hair, owing their preservation largely to the dry air of Upper Egypt. In humid Lower Egypt practically all mummies have perished. By the time of the New Kingdom (1570–322 B.C.) the art of embalming had reached its height, and it is possible to determine fairly accurately how the great pharaohs appeared in life, e.g., Amenhotep II (in his tomb near Thebes) and Thutmose III, Thutmose IV, Tutankhamen, Seti I, and Ramses II (all in Cairo). Mummification was related to beliefs concerning the afterlife and was undertaken to safeguard the fate of the soul. The Egyptian method of preparing the body varied over time and also with the social status of the deceased. At first only kings were mummified; later their retinue received similar treatment. Eventually, numerous animals that were considered sacred (cats, dogs, cows, etc.) were likewise embalmed. From the Middle Ages until the 18th cent., ground Egyptian mummies were sold in Europe as a panacea.