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Ḥasan (born 624, Arabia—died 670, Medina) was a grandson of the Prophet Muhammad (the founder of Islam), the elder son of Muhammad’s daughter Fāṭimah. He belongs to the group of the five most holy persons of Shīʿah, those over whom Muhammad spread his cloak while calling them “The People of the House.” After his father, ʿAlī, he was considered by many of his contemporaries to be the rightful heir to Muhammad’s position of leadership. As...