The Medracen ( Imedghassen tomb ) or Medghassen [1] or Madghis is a Numidian mausoleum dating from the third century BC. AD on the territory of the municipality of Boumia in the wilaya of Batna in Algeria. It is a gigantic dome encircled by columns with Doric capitals.

This is the oldest preserved ancient royal mausoleum of North Africa . According to medieval historians , it takes its name of a king of Numidia . It was submitted for inclusion in the World Heritage List by the Algerian authorities in 2002 [ 2] . It is ranked among the 100 most endangered monuments on the planet . [3]