This square fortress was built in the late 16th c/10th c. AH overlooking the city of Fés, with towers at each corner. Some scholars have argued that towers were a later addition, possibly as late at the Alawite dynasty, but this is unproven. Today it serves as a military museum.
Mezzine, Mohamed. "North Burj." Discover Islamic Art - Virtual Museum - monuments_ISL_ma_Mon01_12_en. Accessed December 02, 2017. http://www.discoverislamicart.org/database_item.php?id=monuments%3BISL%3Bma%3BMon01%3B12%3Ben.