The article focuses on the activities of Bolesław, Archbishop of Esztergom, whose appointment was due to the intervention of Elizabeth, the daughter of the Polish king Władysław the Elbow-high and the fourth wife of the Hungarian king Charles Robert. Despite the rich Hungarian literature on this subject, Polish historiography avoided this figure. The author discusses various aspects of Bolesław's activities, including his economic, ecclesiastical and political involvement. The archbishop effectively took care of the archbishopric's property, enriching it with confiscated goods and purchased new ones. Historical sources allow us to trace his church activities, including the convening of provincial synods, although the details of one of them from 1326 are better known than the other, probably from 1323. Bolesław also participated in political life, representing the interests of King Charles Robert in Venice in 1322. The article also discusses Bolesław's involvement in resolving local conflicts and his dispute with the bishop of Kraków in 1370 over church jurisdiction over Polish settlements.