Saqqara contains the oldest complete stone building complex known in history, the Pyramid of Djoser, built during the Third Dynasty. Another sixteen Egyptian kings built pyramids at Saqqara, which are now in various states of preservation. High officials added private funeral monuments to this necropolis during the entire Pharaonic period. It remained an important complex for non-royal burials and cult ceremonies for more than 3,000 years, well into Ptolemaic and Roman times.