Dariusz Dąbrowski, prof., head of the Department of Historical Auxiliary Sciences and History Education at the Faculty of History, Kazimierz Wielki University in Bydgoszcz. His academic interest focus on the genealogy of the Rurikids, the culture and social history of medieval Rus’, including Rus’ historiographical sources, the history of Polish museums until 1945, and cultural tourism, especially in relation to the Chełmno Land; contact: tatar1965@gmail.com.