English: The Qarmatians (Arabic: قرامطة, romanized: Qarāmiṭa; Persian: قرمطیان, romanized: Qarmatiyān)[a] were a militant[ Isma'ili Shia movement centred in al-Hasa in Eastern Arabia, where they established a religious—and, as some scholars have claimed, proto-socialist or utopian socialist—state in 899 CE. Its members were part of a movement that adhered to a syncretic branch of Sevener Ismaili Shia Islam, and were ruled by a dynasty founded by Abu Sa'id al-Jannabi, a Persian from Jannaba in coastal Fars. They rejected the claim of Fatimid Caliph Abdallah al-Mahdi Billah to imamate and clung to their belief in the coming of the Mahdi, and they revolted against the Fatimid and Abbasid Caliphates.