A mysterious 4,000-year-old wall is rewriting North Africa’s history

A remarkable 4,000-year-old defensive structure discovered in Morocco is rewriting what scientists thought they knew about ancient North African civilizations. The massive fortifications reveal unexpectedly sophisticated prehistoric societies and suggest that the region played a much greater role in Mediterranean history than previously recognized. A mysterious 4,000-year-old wall is rewriting North Africa’s history.

The discovery of a substantial built structure suggests that, during the second millennium BC, communities in north-west Africa were actively shaping their environment. They were also engaging in broader networks of interaction across the Mediterranean world. Previous research by the Oued Beht Archaeological Project had already brought to light what is likely the earliest and largest agricultural complex ever discovered in Africa outside the Nile Valley.

New excavations carried out in 2023 – in which we took part – have now deepened our understanding of the site. Our new study shows how we uncovered the earliest known large-scale construction of a probably defensive nature in north Africa beyond the Nile Valley. It’s not known exactly what threats these wall-like structures were designed to counter.