The Manuscripts Department of the National Library of Russia 1 holds a codex entitled Le livre du triomphe de la force et de la prudence 2 (The Book of the Triumph of Fortitude and Prudence), which is a copy of the work of the same name by the French author Jean Thenaud 3 . It entered the library along with many other manuscripts from the collection of Piotr Petrovich Dubrovsky, who had taken them from Saint-Germain-des-Prés Abbey in France before 1792 [20]. Both Thenaud's work and the manuscript are of immense historical and cultural value as examples of French humanist literature. Thenaud's treatise is an important literary and philosophical work of the French Renaissance 4 . Our focus will be on studying the artistic features of the manuscript copy of this work from the NLR.In the early 16 th century, Jean Thenaud, the author of this moral treatise, served Louise of Savoy, the mother of the future King of France, Francis I of Valois, and was involved in the education of the future monarch. The modern study of his writings, which are mostly didactic, moral, and even Kabbalistic, gives us a better understanding of Renaissance society in France and of the spread of humanistic ideas during that period.King Charles VIII of France died childless in 1498 and was succeeded by his relative from the Orleans branch of the Valois dynasty -Louis XII. He, too, had no male heirs, only two daughters, Claude and René. Thus, his closest cousin Francis of Angoulême (Valois) became heir to the royal throne and later married Louis XII's eldest daughter, Claude of France. His mother, Louise of Savoy, a powerful figure at the court during her son's reign, played a crucial role in his upbringing and, among other things, ordered the treatises for his education.The principal moral works intended for Francis of Valois date from about 1509 to 1522, given that he was summoned to the court as the legitimate heir [5, p. 27] in 1508, and ascended the throne in 1515 as Francis I. The works of Jean Thenaud, who became part of his family's inner circle, were also written during that period. 1 Hereinafter -NLR. 2 Manuscripts Department of the NLR. Fr.F.v.XV.1. The title of the treatise ("Le livre du triomphe de la force et de la prudence"), available in the manuscript, reflects its books in reverse order. It starts with The Book of the Triumph of Prudance (fol. 2r-97r) and only then we find The Book of the Triumph of Fortitude (fol. 98r-184v). 3 See manuscript synopsis [19, pp. 206-209]. 4 Ill. 136. A traveler transferred to the Earthly Paradise sees nine worthy men and women. Manuscripts Department of the NLR. Fol. 179v. © NLR Ill. 134. Appearance of a nymph that came down from Mount Sinai before the author. Manuscripts Department of the NLR. Fol. 97v. © NLR Ill. 135. The monarch is on his way to the City of Victory. Manuscripts Department of the NLR. Fol. 149v. © NLR