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Yāqūt Shihāb al-Dīn ibn-ʿAbdullāh al-Rūmī al-Ḥamawī (1179–1229) (Arabic: ياقوت الحموي الرومي) was a Muslim scholar of Byzantine Greek ancestry active during the late Abbasid period (12th-13th centuries). He is known for his Mu'jam ul-Buldān, an influential work on geography containing valuable information pertaining to biography, history and literature as well as geography.