Hasan al-Askari
…the eleventh of the Twelve Imams, and father of the Muhammad al-Mahdi in Twelver Shia Islam. He was born in Medina in 844 and brought with his father, Ali al-Hadi, to the garrison town of Samarra in 848, where the Abbasid caliphs held them under close surveillance until their deaths, even though neither were…