Imam Hasan Mujtaba mourning ceremony at Aale rasul Hussainiya in Baghdad, Iraq

Al-Ḥasan b. ʿAlī b. Abī Ṭālib (a) (Arabic: الحسن بن علي بن أبي طالب) (b. 3/625 - d. 50/670), known as Imam al-Hasan al-Mujtaba, was the second Imam of the Shi'a Muslims (40-50/661-670).