Chapter 1 introduces the object of this monograph: to present a new reading of the complete works of Constantine Manasses, thereby offering a potential model for analysing other authorships based on commission and patronage. The primary focus here is on the key concept of occasional literature and its specific position between writer and patron, fiction and reality. The latter is defined in terms of two kinds of referentiality: on the one hand, the text’s connection to the occasion (pretext/performance); on the other, its (literary/potentially fictive) representation of a ‘reality’ that is relevant to that occasion. It is assumed that writing on command privileges originality and encourages the challenging of conventions. A society like twelfth-century Byzantium, in which occasional poetry and rhetoric had central positions, therefore called for a strong and individual voice of the author, since the voice was the primary instrument for a successful career.