The Great Pyramid of Egypt located in Giza is the largest pyramid in the world. It is also included in the list of the Seven Wonders of the World. Pyramids were builts by slaves for their pharaohs or kings. Royalties were mummified when dead and buried with their treasures. It was believed that when pharaohs die, part of their spirit remain in their bodies. Hence, pyramids were built to take care of the spirit.