The paper is dedicated to the generalisation of the investigations results for the 13th–15th Curonian Spit archaeological sites, with the analyse of the main types of finds and supposed Prussian and Curonian contact zone problem. Last decade’s established theories about the 13th–15th Curonian Spit archaeological sites populaton are also reviewed and revised. Unpublished till now new archaeological investigations and archival data is reflected in this study.