EN
Paper summarizes selected source information concerning strongholds as power institutions of Polish monarchy in 10th–12th c. AD: forged foundation diploma for Mogilno Benedic¬tine abbey (with date 1065), papal bullae for Gniezno, Włocławek, Wrocław and Kraków dioceses, and relevant fragments of Gallus Anonymus and Magister Vincentius chronicles. Author considers the power system in the 10th–12th centuries’ Poland as a concise of rela¬tionships between rulers and commoners, based on the legal status of social groups as milites and peasants, and territorial governance located in strongholds (with fiscal, military and supposedly judicial competences).