The walls that surround the old Medina of Salé, the city of the seven gates, are today true monumental witnesses that inform the visitor about the centuries-old history of this city, which distinguished itself in the past both by its warlike prowess on the seafront and by its cultural influence. The city was, in fact, the impregnable refuge of Muslims fleeing fallen Andalusia and subsequently forged the enviable image at the time of a city known for its intellectual effervescence and its privateering activities, which made it an unavoidable platform in the field of maritime trade. Throughout history, its walls, the oldest of which dates back to the Almoravid era in the 12th century and the most recent to the Alaouite era, testify to this dynamic, such as Bab Lamrissa, once a shipyard for the repair of maritime warships. Its walls, erected over four kilometres, had five towers and eight gates, four of which are still operational. One of its walls, namely Bab Lamrissa, was built at the initiative of Sultan Abou Youssef Mrini (13th century) by the Andalusian architect Mohamed Belhaj E-chbili. A 30-metre wall that is among the highest structures in the country and represented a bridge of exchange between the old Medina and the outside world. The names of the city's gates were attributed according to the origin of the inhabitants settled in Salé, such as Cordoba, Ceuta, or Fès, better known by the name “Bab El Khmis” because the weekly Souk was held nearby every Thursday. The names of certain gates were also attributed in tribute to renowned thinkers and Ulema, as is the case for Bab Sidi Bouhaja in reference to Brahim Bouhaja Errandi, who was called from Andalusia by Sultan Abou Inan Mrini to take care of the Zaouia of Nessak built in the 14th century. A scholar who was both respected and adored by Muslims and Jews. Today as yesterday, the walls of Salé, monuments out of time, are undergoing a rejuvenation as part of the immense development project of the Bouregreg valley, as well as the rehabilitation operations programmed by the urban commune of the city.