1082. Another restoration occurred after 1401 and this version, which survived until another fire in 1893, was again decorated with miniature arcades, while its semi-dome was filled with coffering similar to Roman architecture. Finbarr Barry Flood has suggested that the perpetuation of the mihrab's arcaded decoration across several restorations indicates that the medieval restorations were aimed at preserving at least some of the original mihrab's appearance, and therefore the 8th-century Umayyad mihrab may have had these features. Abbasid and Fatimid era Following the toppling of the Umayyads in 750, the Abbasid dynasty came to power and moved the capital of the Caliphate to Baghdad. Apart from the attention given for strategic and commercial purposes, the Abbasids had no interest in Damascus. Thus, the Umayyad Mosque reportedly suffered under their rule, with little recorded building activity between the 8th and 10th centuries. However, the Abbasids did consider the mosque to be a major symbol of Islam's triumph, and thus it was spared the systematic eradication of the Umayyad legacy in the city. In 789–90 the Abbasid governor of Damascus, al-Fadl ibn Salih ibn Ali, constructed the Dome of the Treasury with the purpose of housing the mosque's funds. The so-called Dome of the Clock, standing in the eastern part of the courtyard, may have also been erected originally by the same Abbasid governor in 780. The 9th-century Jerusalemite geographer al-Muqaddasi credited the Abbasids for building the northern minaret (Madhanat al-Arous, meaning 'Minaret of the Bride') of the mosque in 831 during the reign of Caliph al-Ma'mun (). This was accompanied by al-Ma'mun's removal and replacement of Umayyad inscriptions in the mosque. By the early 10th century, a monumental water clock had been installed by the entrance in the western part of the southern wall of the mosque, which was consequently known as Bab al-Sa'a ('Gate of the Clock') at the time but is known today as Bab al-Ziyada. This clock seems to have stopped functioning by the middle of the 12th century. Abbasid rule over Syria began crumbling during the early 10th century, and in the decades that followed, it came under the control of autonomous realms who were only nominally under Abbasid authority. The Fatimids of Egypt, who adhered to Shia Islam, conquered Damascus in 970, but few recorded improvements of the mosque were undertaken by the new rulers. The Umayyad Mosque's prestige allowed the residents of Damascus to establish