The reappearance of Muhammad al-Mahdi is the Twelver eschatological belief in the return of their Hidden Imam in the end of time to establish peace and justice on earth. For Twelvers, this would end a period of occultation that began shortly after the death of Hasan al-Askari in 260 AH (873-874 CE), the eleventh Imam.While the miraculously prolonged life of the eschatological …

Ali ibn Hasan ibn Ali (Arabic: عَلِيّ ٱبْن حَسَن ٱبْن عَلِيّ, romanized: Alī ibn Ḥasan ibn Alī), better known as Ali al-Taqi (Arabic: عَلِيّ ٱلْتقيّ, romanized: Alī al-Taqī, lit. 'Ali the Pious') was a Sunni Muslim saint.He is considered by some genealogists to be the second son of Hasan al-Askari, the eleventh Shia Imam, and a brother of the twelfth ...