Jamāl ad-Dīn Hasan ibn Yusuf ibn 'Ali ibn-i Mûtahhar[1] al-Hilli (Arabic: جمال الدين الحسن بن يوسف الحلي), also known as al-Allamah al-Hilli (Arabic: العلامة الحلي, "the sage from Hilla"),[2] born December 15, 1250 CE (19 Ramadan 648 AH), died December 18, 1325, was a Twelver Shia theologian and mujtahid.