summary:
Imam Abu Muhammad Hassan al-Askari(A.S.) was poisoned by the caliph, Mu'tamad, and, thus, suffered severely and was martyred on 8th of the month of Rabi' Awwal in the year 260 (A.H.). At the time of his death, he was twenty-eight years old. He was buried in the house in which his father was buried in Samarra'. He left behind his son - Living Holy Awaited Saviour Imam Muhammad al-Mahdi (A.S.) the one who is awaited to bring about the heavenly rule of truth in the whole world.
