| Al-Abhārī | |
| Death Date: | 1262–1265 |
| Death Place: | Shabestar, Iran |
| Era: | Islamic Golden Age |
| School Tradition: | Sunni Ashari |
| Main Interests: | Astronomy, Mathematics, Philosophy, Islam |
| Influences: | Kamāl al‐Dīn ibn Yūnus, Fakhr al‐Dīn al‐Rāzī, Kūshyār ibn Labbān, Jābir ibn Aflaḥ |
| Influenced: | Ibn Khallikān, al‐Kātibī, Shams al‐Dīn al‐Iṣfahānī, al-Samarqandī, al‐Qazwīnī, Naṣīr al‐Dīn al-Ṭūsī. |
Athīr al‐Dīn al‐Mufaḍḍal ibn ʿUmar ibn al‐Mufaḍḍal al‐Samarqandī al‐Abharī, also known as Athīr al‐Dīn al‐Munajjim (d. in 1265 or 1262[1] Shabestar, Iran) was an Iranian muslim polymath, philosopher, astronomer, astrologer and mathematician. Other than his influential writings, he had many famous disciples.
His birthplace is contested among sources. According to the Encyclopaedia of Islam[2] and the Encyclopaedia Islamica, he was born in Abhar, a small town between Qazvin and Zanjan. Encyclopædia Iranica mentions that he was born in Mosul,[3] but according to Encyclopaedia Islamica, none of his oldest biographers mentioned Mosul as his birthplace.[4] Beside the city of Abhar, the epithet al-Abharī could suggest that he or his ancestors originally stem from the Abhar tribe. He may have died of paralysis in Adharbayjan.
He is said to have been a student or teacher in various schools in Greater Khorasan, and in Baghdad and Erbil, living for some time in Sivas. Ibn Khallikān reports that he was a student of Kamal al-Din ibn Yunus, but other sources state that he worked as an assistant to Fakhr al‐Dīn al‐Rāzī.