This catalogue is the eleventh volume of the SNG Turkey Project and covers the Lydian and Phrygian coins in Çetin Erdem Collection. Çetin Erdem, the collector, is a lawyer living in the town of Sarıgöl in the Manisa Province. All the coins were bought between the years of 1995-2016 by himself, in Sarıgöl, where he lives. The three cities in the catalog, represented by a large amount of coins, are Sardis, Philadelphia and Thyatira.