Al-Hasan ibn ‘Alī ibn Abī Tālib (born March 4, 625 CE (Ramadhān 15th, 3 AH) – died March 9 or 30, 670 CE (Safar 7th or 28th, 50 AH) aged 47) is an important figure in Islam.

He is the son of Ali and his wife Fatimah.

The latter is the daughter of the Islamic prophet Muhammad.

After his father's death, he briefly succeeds him as the righteous Caliph (head of state), before retiring to Medina and entering into an agreement with the first Umayyad ruler, Muawiyah ibn Abi Sufyan, who assumes the Caliphate.

Both Sunni and Shia Muslims regard Hasan as a martyr.

Hasan is one of the five people of the Ahl al-Kisa, as well as a member of the Ahl al-Bayt.

Hasan ibn Ali is 2nd Imam of Shia Islam.

Hasan is also highly respected by the Sunni as the grandson of Muhammad.