Krzemieniec Lyceum (Polish: Liceum Krzemienieckie; Russian: Кременецкий лицей; Ukrainian: Крем'янецький ліцей; sometimes referred to as "the Volhynian Athens" and "Czacki's School") was a renowned Polish secondary school which existed 1805-31 and later, in the Interbellum, in 1922-39 in Krzemieniec (now Kremenets in Ukraine).
The school served as an educational center for the southeastern part of the former Polish–Lithuanian Commonwealth (which had been partitioned out of existence in the late 18th century by Russia, Prussia and Austria).
Czacki chose Kremenets because it was located near the Russian-Austrian border and so could also attract students from Austrian Galicia.
Krzemieniec also offered a major advantage over neighboring cities such as Dubno and Zytomierz: the massive complex of former Jesuit college buildings.
The school offered a broad educational program, aimed not only at formal instruction but also at students' general intellectual development.
Numerous donors helped with money, and the school had a modern astronomical observatory and excellent laboratories.
In 1941, 30 Polish intellectuals connected with the school, mostly teachers, were executed by the Germans, based on a list given to them by Ukrainian nationalists.