Qarmatians

The Qarmatians (Arabic: قرامطة‎ Qarāmita "Those Who Wrote in Small Letters"; also transliterated "Carmathians", "Qarmathians", "Karmathians" etc.) were a Shi'a Ismaili group centered in eastern Arabia, where they attempted to establish a utopian republic in 899 CE. They are most famed for their revolt against the Abbasid Caliphate. Mecca was sacked by the sect’s leader Ṭāhir Sulaymān, particularly with their theft of the Black Stone and desecration of the Well of Zamzam with corpses during the Hajj season of 930 CE.