The article analyzes the philosophical course of Stephan Kalynovskyi taught at Kyiv-Mohyla Academy in 1729–1731. By now researchers considered this course to be one of the best monuments of Ukrainian philosophical thought of that time. However, the textual analysis has shown that the course was borrowed verbatim from François le Reés, a French author who wrote it in Paris in the 1630s. The article also analyzes all other currently known educational courses of Kalynovskyi (courses on rhetoric, history, mathematics). Neither they (...) were written by the professor himself, but borrowed, mostly verbatim, from other authors. The article drew conclusions about the (un)originality of Kalynovskyi's courses based on a comparison of his courses with their sources, identifying authorial changes, deviations, etc. In addition, an attempt was made to find out whether the verbatim borrowing of someone else's text without indicating the author during teaching could be considered plagiarism at that time. Biographical information about Kalynovskyi, as well as an overview of the church sermons that he delivered as a bishop, allows a better understanding of his educational courses. (shrink)