Thābit ibn Qurra (full name: Abū al-Ḥasan ibn Zahrūn al-Ḥarrānī al-Ṣābiʾ, Arabic : أبو الحسن ثابت بن قرة بن زهرون الحراني الصابئ, Latin : Thebit/Thebith/Tebit ; 826 or 836 – February 19, 901), was a polymath known for his work in mathematics, medicine, astronomy, and translation. He lived in Baghdad in the second half of the ninth century during the time of the Abbasid Caliphate.