Currently, there is an increased interest in ceremonial culture. A ceremonial is a kind of cultural message from one social group of people to another. The basic idea of behaviour, the inner meaning of secular ceremonial is laid down in church rituals, and external forms of behaviour can be borrowed from the traditions of everyday secular life. Diplomacy as one of the spheres of applied politics is a very complex and responsible type of human activity, which has always had a pronounced ritual character. The conclusion of contracts and alliances took place according to a certain scenario plan, according to which the ceremonial action developed. During the preparation and holding of the ceremony, the exchange of diplomatic letters and embassies continued, solemn meetings were arranged for the honored guests, feasts, theatrical performances, games, and festivities were given in their honor. the purpose of the article is to conduct a comprehensive study of the communicative functions of diplomatic ceremonial in international communication based on the analysis and generalisation of new facts with the involvement of archival materials and other sources introduced into scientific circulation for the first time. In this study, art is considered for the first time from the point of view of the communicative factor of a diplomatic ceremony. A ceremonial is an event in the life of society that has a symbolic meaning. The norms of ceremonial reflect not only ideology but also the social psychology of society, without an adequate interpretation of which it is impossible to correctly understand the behavior of statesmen in specific situations related to their official status.