Mohamedia is a town in Ben Arous Governorate, Tunisia. was governed by the joint municipality of Mohamedia before its becomes an independent municipality, it is also the seat of an eponymous governoral delegation. Near the town are the ruins of Megalopolis a Roman Era civitas of Roman Proconsulari. Mohamedia was formerly known by the name of Ṭunbudha, and has been known by the current name of al-Muhammadiya since around the 11th century CE. The town grew up around the strategic Byzantine fortress of Tunbudha which, from its hilltop position, controlled the roads into Tunis and Carthage.