Eastern Province, Saudi Arabia
…group of the Isma'ili branch, around 899 AD. The Qarmatians attacked Mecca and Medina in 930 AD and held the Black Stone to ransom in Ain Al Kuayba, Qatif. The region was ruled by the Qaramatians until 976 AD, when after losing to the Abbasids, they were reduced to the status of a local power. After Bahrain…