The first ever pyramid - the Step Pyramid
Traditionally Egyptian tombs were sealed with a slab of concrete on top. A very clever achitect , Imhotep, created this one for King Zoser (Djoser - 2667-2648 BC) in the traditional way. However you can never complete a person's tomb while they are alive as it would mean it would be their time to die. Imhotep realsied he was going to finish the slab while Zoser was still young and strong, so he built a second slap on top of the firts, then a third and so on. This was the first pyramid, built over 4650 years ago!