al-Shaykh al-Mufid

Al-Shaykh al-Mufid was a Twelver Shia theologian and jurist of Baghdad and the leading Shia scholar of the Buyid period. He defended Shia doctrine in debates with Sunni and Mu'tazili opponents, adopting rational methods in theology, and his Kitab al-Irshad on the lives of the twelve Imams remains a standard work. His students included al-Sharif al-Murtada and al-Shaykh al-Tusi.