Central Pomerania is one of the areas with the most significant number of early medieval strongholds preserved today. This is probably why the area became the focus of an extraordinary research project carried out half a century ago by a team led by Jerzy Olczak and Kazimierz Siuchniński. New surveys of heavily forested areas, using LiDAR data, made it possible to significantly expand the list of sites and verify and clarify some objects' chronology. The paper will present the results of the excavations in the context of the distinctiveness of this part of Pomerania with the leading role of the Słupia River and the Słupsk and Udorpie (Bytów) strongholds located at its edge.
