This article examines the ceremonial reception of papal legates in the early Middle Ages. It offers a precise, distinctive and normative portrait of their ritualised practice well before the existence of written canonical rules and procedures. The customs, principles, gestures and symbols conditioning legatine activities in this historical era became necessary pre-conditions to political communication, interaction and exchange. Their expression and representation, it is argued, help to explain the manifestation of Roman authority in distant Christian provinces, its varied meaning to contemporaries and the formative rules of political governance and diplomacy.