- ... that Baroness Maria Bal (pictured as Angel of Death) served as a live model for a series of Symbolist portraits of women, as well as nude studies and mythological creatures, by Jacek Malczewski?
- ... that Ruthenian nobility became increasingly Polonized with time?
- ... that the Legislative Sejm of 1919–21 was the first national parliament of the Second Republic of Poland?
- ... that Marcel Déat, the French author of the World War II anti-war slogan Why Die for Danzig?, later became a Nazi collaborator?