Polish Law and Social Sciences , Humanities , Medical , Theological , Mathematical-Life sciences faculties continued to work underground with lectures and exams held in private flats until 1944 . Polish professors who took part in the underground courses included Iwo Jaworski , Kazimierz Petrusewicz and Bronisław Wróblewski . The diplomas of the underground universities were accepted by many Polish universities after the war . Soon after the annexation of Lithuania by the Soviet Union , while some Polish professors were allowed to resume teaching , many others ( along with some Lithuanian professors ) who were deemed " reactionary " were arrested and sent to prisons and gulags in Russia and Kazakhstan . Between September 1939 and July 1941 , the Soviets arrested and deported nineteen Polish faculty and ex-faculty of the University of Stefan Batory , of who nine perished : Professors Stanisław Cywinski , Władysław Marian Jakowicki , Jan Kempisty , Józef Marcinkiewicz , Tadeusz Kolaczyński , Piotr Oficjalski , Włodzimierz Godłowski , Konstanty Pietkiewicz , and Konstanty Sokol-Sokolowski , the last five victims of the Katyn massacre
Katyn massacre
Katyn massacre
Vilnius University