According to the provided reference from Wikipedia regarding Muhammad al-Mahdi, the Twelfth Imam of Twelver Shi'ism, he was born in Samarra, Abbasid Empire.
Based on the information available in the reference:
| Title | show List of titles |
| Personal | |
| Born | c. 255 AH ( c. 868 CE) Samarra, Abbasid Empire |
| Religion | Shia islam |
This table, extracted from the reference titled "Muhammad al-Mahdi | Muhammad al-Mahdi مُحَمَّد ٱلْمَهْدِي Twelfth Imam of Twelver Shi'ism", clearly states his place of birth.
Therefore, the reference indicates that Muhammad al-Mahdi was born in Samarra.
