This enormous structure rising over the desert sands near the Euphrates River resembles a sandstone butte but is actually made of mud-bricks, and is about 3,400 years old. The structure was originally a ziggurat standing some 60 meters tall with a foundation about 70 meters square. What remains today is the core; the rest was destroyed along with the city of Dur-Kurigalzu that was invaded by the Elamites in the 12th century BC.