The Mastaba, a project for Abu Dhabi, was conceived in 1977
The Mastaba will be 150 meters (492 feet) high, 225 meters (738 feet) deep at the 60 degree slanted walls and 300 meters (984 feet) wide at the vertical walls. The top of The Mastaba will be a horizontal surface 126.8 meters (416 feet) wide and 225 meters (738 feet) deep