Early Muslim ruling dynasties of the time included Rawadids, Sajids, Salarids, Shaddadids, Shirvanshahs, and the Sheki and Tiflis emirates. The principal cities of Arran in early medieval times were Bardha'a (Partav) and Ganja. Bardha'a reached prominence in the 10th century, and was used to house a mint. Bardha'a was sacked by the Rus and Norse several times in the 10th century as result of the Caspian expeditions of the Rus. Bardha'a never recovered after these raids and was replaced as capital by Baylaqan, which in turn was sacked by the Mongols in 1221. After this Ganja rose to prominence and became the central city of the region. The capital of the Shaddadid dynasty, Ganja was considered the "mother city of Arran" during their reign.