The pyramid of Khufu (around 2560 BC.) is the largest in Egypt and the first successful true pyramid.
It was built for the 4th dynasty pharaoh, Khufu. (The step pyramid precedes this one, but is not a true pyramid because of its step structure.)
It is called the Great Pyramid Of Giza (or Cheops) and is the oldest of the seven ancient wonders of the world left largely intact. It has three inside chambers and is the only pyramid with both ascending and descending passages.