Archaeological Site of Sédrata is a ruined city dating back to the Middle Ages, located in Ouargla Province in Algeria. Researchers believe that the history of the city’s founding dates back to the 10th century AD, when it was founded by the Rustamid dynasty after the fall of their state and their city Tihert (currently Tiaret) at the hands of the Fatimids in 909 AD. The city prospered for three centuries until it was finally destroyed in the 13th century. It should be noted that the Rustamids are a ruling dynasty belonging to the Ibadi sect that ruled Central Maghreb (Medieval Algeria) between 776 and 909 AD, as their stronghold was in the city of Tihert, which is currently the city of Tiaret in Algeria.