The Nasser D. Khalili Collection, with it's more than 8,500 coins, ranks as one of the world's largest collections in the field of Islamic numismatics. The coins, include no less than 500 unpublished types in terms of date and mint. While these occur in the better-known categories, such as Abbasid dirhams, in some cases they represent completely new series, such as those of the emirs of 'Athbar in Arabia and the Najahid rulers of Zabid in Yemen. This...