 However Romans controlled the Nile many kilometres into Africa up to Syena, Berenice, Hyerasykaminos and even Qasr Ibrim, (the southernmost of all), near the modern border between Egypt and Sudan, then Meroe, lying very near the tropic.The period in which each aforementioned town represented the final frontier of Rome is uncertain.In Africa Romans controlled the area north of the Sahara, from the Atlantic Ocean to Egypt, with many sections of limes (Limes Tripolitanus, Limes Numidiae, etc.