Title: Die Geistliche Kommunion der Heiligen Boris und Gleb
Subjects: Polish Jesuit drama, History and criticism, In literature, Kommunia Duchowna S.S. Borysa y Hleba, Polish drama, history and criticism, Polish drama, Baroque literature, Polish language, Rhetoric, Christian martyrs in literature
People: Boris kni︠a︡zʹ rostovskiĭ, Saint (-1015), Gleb kni︠a︡zʹ muromskiĭ, Saint (approximately 984-1015)