En deux parties distinctes mais complémentaires, ce travail se présente comme le parallèle dans le domaine grammatical des recherches menées sur l’archaïsme dans la rhétorique et la littérature latines. Nous analysons tout d’abord la manière dont les grammairiens latins, de Varron à Priscien, considèrent ce phénomène, dans le cadre de la définition de la langue latine correcte (Latinitas). Les questions du recours aux archaïsmes dans l’usage et de l’autorité des auteurs littéraires anciens, telles que l’on peut les retrouver dans les textes du corpus des grammatici Latini, sont au centre de notre étude. Nous proposons ensuite pour la première fois une édition avec traduction et commentaire critique des fragments de Flavius Caper, grammairien de la fin du IIe siècle après J.-C. : cette époque marquant la diffusion d’une mouvance stylistique et littéraire archaïsante, l’examen du point de vue d’un grammairien sur la langue latine contemporaine se révèle primordial pour comprendre l’évolution de la pensée linguistique antique. L'édition des fragments du De Latinitate et du De dubiis generibus de Caper nous donne par ailleurs l'occasion de réfléchir aux problèmes des sources et de la transmission des textes, aussi bien grammaticaux que littéraires, ainsi que d'effectuer un commentaire analytique sur un auteur à tort négligé et qui, par sa réception, a joué un rôle de premier plan dans la tradition artigraphique tardo-antique. / Organised in two complementary parts, the present research follows up, in the grammatical tradition, on other studies led on archaism in the fields of Latin rhetoric and literature. The first part deals with the way in which Latin grammarians, from Varro to Priscian, apprehend the notion of archaism, within the definition of what they consider to be the correct Latin language (Latinitas). The study is focused on both the main issues of the use of archaisms in the current usage, and the ancient poets’ and prose writers’ authority, as noticeable in the grammatici Latini corpus. In the second part, an edition of Flavius Caper’s grammatical fragments, with a French translation and critical commentary, is proposed for the first time. Caper is a scholar of the end of the 2nd century AD, an era especially known for the diffusion in the literary circles of an archaizing stylistic tendency. Consequently, examining the point of view of a grammarian on the linguistic usage of his time appears crucial to understanding the evolution of linguistic thought in Antiquity. The edition of Caper’s fragmentary De Latinitate and De dubiis generibus gives us the opportunity to reflect upon sources and transmission of grammatical and literary texts. Finally, the comments made on the work of a still unrecognised scholar should highlight the importance of his treatises in the late antique grammatical tradition.

For the first time, the reception of the poetic legacy of the Latin poet Horace (65 B.C.-8 B.C.) in the poetics courses taught at the Kyiv Mohyla Academy (17th-first half of the 18th century) has become the subject of a wide-ranging research project presented in this dissertation. Quotations from Horace and references to his oeuvre have been divided according to the function they perform in the poetics manuals, the aim of which was to teach pupils how to compose Latin poetry. Three main aspects have been identified: the first consists of theoretical recommendations useful to the would-be poets, which are taken mainly from Horace's Ars poetica. The second aspect is the use of Horace's poetry as a model of word usage, tropes, rhetorical figures, and metrical schemes. Finally, the last important aspect of the reception of Horace is how his works could be imitated and his words or dicta borrowed in the composition of poetry, in which students were expected to exercise as part of the poetics course. The research draws the conclusion that Horace's legacy was of paramount importance in the manuals analyzed: on the one hand the Mohylanian poetics teachers' tendency (after Renaissance literary theorists and critics) to consider poetry within rhetorical categories rendered Horace's Ars Poetica extremely congenial to them. On the other, Horace's ideas were extrapolated from their original context and at times modified to serve a moralistic and "utilitarian" conception of poetry, which considered the latter as an instrumental science that served the ends of moral philosophy. With its metrical virtuosity and brilliant verbal craftsmanship, Horace's poetry provided an excellent model for the introduction of Christian content. The analysis of the way pagan authors (Horace first and foremost) were elaborated in a Christian key in the poetry composed by Mohylanian teachers and pupils indicates that education (and with it the assimilation of the Classics) at the KMA was not extraneous to the integration of ancient learning in Christian thinking as it took place in the different confessional schools of contemporary Western Europe. / Slavic Languages and Literatures