Résumé :
In a recent study on the illuminated Octateuchs, Lowden has defined this group of luxurious manuscripts as a typically ‘Byzantine phenomenon’. The present paper focuses on Isaac Komnenos’ paraphrase of the Letter of Aristeas, a unique feature of the Seraglio Octateuch. The few modern scholars who have dealt with it have been rather ungenerous in their assessments of Isaac’s literary enterprise. Through an analysis of the structure of the paraphrase and a systematic comparison with the Letter of Aristeas, I demonstrate that these appraisals do not do justice to Isaac’s work, in that they fail to see both the reasons for his interest in this text and the rationale inspiring his rewriting. As I argue, far from being the fruit of Isaac’s abstruse ‘phantasies’, the paraphrase opening the Seraglio Octateuch was carefully structured to fit his self-fashioning agenda, which, in turn, was deeply influenced by the sociopolitical and cultural climate of 12th-century Byzantium. In short, the Seraglio Octateuch will prove to be not just a ‘Byzantine phenomenon’ but a typically Komnenian one.