The growth of the city led to the destruction or removal of much of the archaeological remains of the city's past. The palace area is now almost covered with settlements, as is the former area of the ancient al-Raqqa (today Mishlab) and the former Abbasid industrial district (today al-Mukhtalţa). Only parts were archaeologically explored. The 12th-century citadel was removed in the 1950s (today Dawwār as-Sā'a, the clock-tower circle). In the 1980s, rescue excavations in the palace area began, as well as the conservation of the Abbasid city walls with the Bāb Baghdād and the two main monuments intra muros, the Abbasid mosque and the Qasr al-Banāt.