Ḥasan ibn ʿAli ibn Abī Ṭālib (, 625–670
CE), commonly called
Hasan, was the second Shiite
Imam, succeeding his father
Ali and preceding his younger brother
Husayn ibn Ali. He was the elder son of Ali and
Muhammad's daughter,
Fatimah.
Muslims respect him as the grandson of Muhammad and a member of
Ahl al-Bayt and
Ahl al-Kisa. After the death of his father, Hasan also succeeded him as
Rashidun Caliph. He abdicated after six or seven months, and
Muawiyah, who became the first
Umayyad Caliph, succeeded him. For the rest of his life, Hasan lived in
Medina in seclusion until he died at the age of 45 or 46, and was buried in the
Al-Baqi' cemetery in Medina. His wife,
Ja'da bint al-Ash'at is commonly accused of having poisoned him at the instigation of Muawiyah.