Tomb Z in the Umm el Ga'ab region at Abydos belonged to King Djet of Egypt's 1st Dynasty, and has external measures of 13.6 x 11.3 x 2.40 meters, and internal measurements of  9.3 x 11.9 meters with a  wall thickness of  0.8-1.05 meters. The tomb also has 174 subsidiary burials.

Floorplan of the Tomb Z at Abydos belonging to King Djet (Wadji)