In the interwar period, Kremenets was famous for its renowned high school, Liceum Krzemienieckie, founded in 1803 by Tadeusz Czacki. According to the 1931 Polish census, the town had a population of 19,877, with 8,428 Ukrainians, 6,904 Jews, 3,108 Poles and 883 Russians. In 1934, upon initiative of Ludwik Gronowski, teacher of the Kremenets High School, Volhynian School of Gliding Sokola Góra (Wołyńska Szkoła Szybowcowa Sokola Góra) was opened 14 kilometers from Kremenets, in the village of Kulików. Among its students was the daughter of Jozef Piłsudski, Jadwiga Piłsudska.