Polish-Moroccan archaeological mission, which researches the Roman limes, unearthed remains of a Roman watchtower in late October and early November 2021. The watchtower was a part of the defence system of the ancient city of Volubilis. This research project is conducted within the framework of the agreement of mutual cooperation that was signed in July 2021 by the University of Warsaw and the National Institute of Archaeology and Cultural Heritage in Rabat (INSAP).