Abu'l-Ḥasan ʿAlī ibn Aḥmad al-Sammuqī (Arabic: أبو الحسن علي بن أحمد السموقي‎), better known as Bahāʾ al-Dīn al-Muqtanā (Arabic: بهاء الدين المقتنى‎; died after 1042), was an 11th-century Isma'ili missionary, and one of the main leaders of the Druze religion. His early life is obscure, but he may have been a Fatimid official. By 1020 he was one of the chief disciples of the founder of the Druze faith, Hamza ibn Ali ibn Ahmad. The disappearance of Fatimid caliph al-Hakim bi-Amr Allah, considered by the Druze to be the manifestation of God, in 1021, inaugurated a period of anti-Druze persecution. Al-Muqtana took over the leadership of the remnants of the Druze movement in 1027, and led the missionary activity (the "divine call") of the widely scattered Druze communities until 1042, when he i