Title: Revnitelʹ pravoslavīi͡a kni͡azʹ Konstantin Ivanovich Ostrozhskīĭ (1461-1530) i pravoslavnai͡a litovskai͡a Rusʹ v ego vremi͡a
Subjects: History, Russkai͡a pravoslavnai͡a t͡serkovʹ
Places: Lithuania
People: Kosti͡antyn Ivanovych Ostrozʹkyĭ kni͡azʹ (approximately 1460-1530)