The kasbah of Oudaya is considered as the first milestone of the city of Rabat, although the Kasbah has been destroyed and rebuilt several times. The strategic location on the Atlantic coast, along with the estuary of river Bouregreg, made it an important place to the successive kings and sultans of Morocco. Its Mohidin wall and its giant ancient door (the grand door) are considered symbols of the almohad architecture in addition to its mosque known as the Old Mosque. It seems that the returnees from Andalusia played an important role in influencing the trait of the Kasbah, which was evident in the architecture and the garden that mimics those in Andalusia. In the era of the Alawites, the Kasbah has known several developments such as the construction of the Amiri (prince) Palace and some military installations that played an important role in protecting the Kasbah.

The Kasbah is has many facilities that have played a pivotal role throughout history, especially the court and the prison, and the Kasbah is characterized by a park with abundant trees and water and a museum of traditional products.