It is the oldest shrine in Fez. It houses the tomb of Moulay Idriss II, founder of the city of Fes and the dynasty of Idrissides. It is open all year to Muslim visitors. Non-Muslims when to them, can glimpse inside through a door constantly open. Once a year, in September, a moussem is organized to pay homage to the patron saint of the city, is the Zawiya, with the mosque of Moulay Idriss II, between Place Nejjarine and the souk Attarine.