There are many pyramids in Egypt, but the oldest known pyramid is the Pyramid of Djoser, which finished construction in 2611 B.C. The most well-known pyramids are the Giza Pyramids, which finished construction in 2504 B.C.
Most pyramids were built as tombs for both the pharaohs of ancient Egypt and their queens. The construction techniques changed from the Old to the Middle Kingdom. The largest pyramid, the Great Pyramid of Giza, is one of the Seven Wonders of the Ancient World. It stood 481 feet high, although it has decreased in height due to erosion. It was built for the pharaoh Khufu.