Built during the Almohad era, the Kasbah El Allia, also called Dar Soltane, represents in itself the memory of the city of Safi for more than eight centuries. This imposing edifice, which initially fulfilled a military function before becoming a cultural temple today, was, in fact, founded towards the end of the 12th century on a hill, according to square geometric perspectives. The structure, which has four observation towers, was built with a view to warding off invasions from the Atlantic side. Its construction would contribute greatly to the birth of the city of Safi, as noted by Wafaâ Madah, head of the inspection of buildings and historical monuments at the provincial delegation of the Ministry of Culture, who indicates that despite the damage caused to its wall and enclosure by the Portuguese army, this citadel continued to effectively fulfil its military role until the second half of the 13th century during the Merinid era. In the 16th century, under "Portuguese occupation, the building would be transformed to serve as a barracks with a new wall and only two towers instead of four previously," indicates the archaeologist Said Chemsi, explaining that the towers, which housed bronze cannons, were built in such a way as to cover the North-East and South-East directions, in order to ward off attacks by the Saadians during their period of occupation, more than 33 years. In the part overlooking the Atlantic, the Portuguese built the Lower Kasbah, also called "Ksar Al Bahr", a building close to Dar Soltane which today needs an urgent restoration operation due to the state of wear that threatens its integrity. The transformations would not stop there, as the Saadians would proceed with improvements inside Dar Soltane, which they would equip with a stable, a guest house, and other premises dedicated to administrative functions. At the top of the towers, they would place cannons manufactured in the Netherlands. During this period, exactly during the reign of Sultan Moulay Zaidane, the city of Safi became a commercial and diplomatic platform. The interest in Dar Soltane would be further affirmed during the reign of the Alaouites by building Dar Al Bahia there, a residence that became over time a residence prized by the Alaouite sultans, thus announcing the end of its military vocation. At the time of the protectorate, Dar Soltane, which would be erected as a national monument and serve as a residence for the controller general in the region, would still undergo some small modifications while preserving its exterior appearance, with the construction of some administrative premises, a court, towers, as well as a house in the pure Moorish style.