“An Unknown Letter of Bishop Walerian Protaszewicz to Pope Gregory XIII from 1576 Concerning the Foundation of the University in Vilnius” (2025) Miscellanea Historico-Iuridica, 24(2), pp. 512–530. Available at: https://miscellanea.uwb.edu.pl/article/view/1690 (Accessed: 11 April 2026).