Abstract : Until the nineteen-sixties, our limited knowledge of the distribution of prehistoric sites in inland northwestern Anatolia was mainly based on the surface surveys carried out by K. Kökten, C. Burney and K. Bittel. The surveys in İznik-İnegöl areas by
D. French (1960-1961, 1965-1966) and J. Cullberg (1964-65) has provided the first preliminary site distribution and material evidence concerning the region. Much later, between the years 1988-1995, T. Efe conducted surface surveys in the Kütahya, Bilecik and Eskişehir provinces4 (Fig. 1) which not only better clarified the site distribution and improved the chronological framework of the region, but also better defined the borders of what he called “cultural regions” and “pottery zones”.