Borj Sud (Arabic: برج الجنوب‎, romanized: Burj al-Janub; “South Tower/Fort”) is a fort in the city of Fez, Morocco. It was first established around 1582 by the Saadian dynasty, likely modeled after Portuguese forts of the time. It is located on the hills overlooking the old city (Fes el-Bali) from the south, across the valley from its sister fort, Borj Nord, on the hills to the north of the city.