Ömer Diler

Ömer Diler was trained as a chemical engineer but became interested in numismatics in 1972 when he received a rare gold coin of the Ottoman Empire as a gift.

In 1993 at the suggestion of Cüneyt Ölçer, Diler began work on what would become a comprehensive book on the coinage of the Ilkhanate.

With more than 250 confirmed mints and a geographical distribution including Iran and large parts of Anatolia, the Caucasus, Mesopotamia, and Central Asia, the project consumed the last twelve years of Diler's life.

Final editing fell to his wife, Emine Nur, Garö Kürkman, and the Bremen-based numismatist, Johann-Christoph Hinrichs.

Ilkhans: coinage of the Persian Mongols appeared in both Turkish and English versions in 2006.

A two dirham coin of the Ilkhan Mahmud Ghazan .