Cette thèse s’intéresse aux historiens classicisants de langue grecque de l’Antiquité tardive. Elle développe une analyse sociale de ces historiens et de leurs écrits. Son objectif principal est de souligner les interactions entre l’écriture de l’histoire, vu comme une pratique sociale, et la société romaine tardo-antique. La première partie dresse la biographie des historiens, d’Eunape de Sardes à Théophylacte Simocatta. Le profil social de ces historiens y est défini, et une attention particulière est portée aux liens entre activité littéraire et carrière professionnelle. La seconde partie étudie plus spécifiquement les élites provinciales tardo-antiques, groupe auquel appartiennent en majorité nos historiens. Elle explique pourquoi pratiquement tous les historiens étaient des avocats et comment ces derniers en venaient à écrire de l’histoire. La dernière partie analyse les fondements sociaux de l’histoire. Elle souligne ce que l’histoire devait à l’éducation tardo-antique et montre comment les vertus de l’historien reflétaient les vertus sociales attendues d’un membre de l’élite tardo-antique. / The main objective of this dissertation is to offer a social analysis of the classicizing historians of late antiquity. It aims to underline the interactions between history-writing and society. The first part presents the biographies of late antique classicising historians, from Eunapius of Sardis to Theophylact Simocatta. It describes the social profile of those historians, while insisting on the interactions between professional career and literary endeavours. The second part explains why most historians were lawyers and analyzes the place history-writing occupies in their social life. The third part deals with the social foundations of history writing. It focuses on the role of rhetorical education in the formation of future historians and shows how the virtues of the historian mirrored the social virtues of late antique elites.

The basic aim of the thesis is to investigate whether the Romans of the East (Byzantines) during the 6th to the 8th centuries were interested in the Latin west and the imperial rule over it. In the first part of the work, the various discourses concerning the origins of the Justinianic conquest or reconquest of Africa and Italy articulated in the contemporary sources are identified and evaluated; the only one which cannot be shown or supposed to have been officially articulated is the discourse of a source of Pseudo-Zachariah Scholasticus which makes African and maybe also Italian exulants complaining in the imperial court about the local rulers responsible for the Vandal and Gothic wars. After some other preliminary studies (e.g. concerning the so-called problem of Theodericʼs constitutional position), it is concluded that the emperor Justinian was not interested in an ideologically founded restoration of the empire, but made the western wars because of his contacts with western aristocrats. In the second part of the thesis, the presentation of the Justinianic western wars and western events or realities in the works of the Byzantine historians from Marcellinus Comes and Procopius to Theophylactus Simocatta (the 6th to the early 7th centuries) is investigated and an attempt is made to explore...