title: Egyptian pyramids
context: The earliest known Egyptian pyramids are found at Saqqara, northwest of Memphis. The earliest among these is the Pyramid of Djoser, which was built c.2630–2610BC during the Third Dynasty.[6] This pyramid and its surrounding complex were designed by the architect Imhotep, and are generally considered to be the world's oldest monumental structures constructed of dressed masonry.[7]
question: How old is the oldest pyramid?
answers: c.2630–2610BC