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The paper will concern the importance of strongholds in the system of both the united Piast monarchy and the later Piast dukedoms, based on written sources, taking into account the historical and political perspective and openness to dialogue with archaeologists, and assuming complementarity to the synthetic text by Franciszek Dąbrowski from 2018 on a similar topic. An attempt will be made to determine what scope of functions of strongholds at various levels is directly reflected in written sources, which can be reconstructed based on certain general assumptions, and which of these assumptions adopted in the current historiography remain correct.