In 1918, they published a research by О. А. Dobiash-Rozhdestvenskaya ‘The Cult of St Michael in Latin Middle Ages’, which was of a serious influence at the studies of the history of religion in the medieval context. The author explained her choice of the research subject: “His churches were not more numeral than others; his name was not mentioned more — even less — than the name of the God Almighty and His Hypostases, even less that names of many earthen protectors – such saints as Martin, Remigius, and Medard, not speaking of Virgin Mary. But there were some peculiar, without analogies, features of him in the cult, which produced some reasons to give him an especial attention”. Those peculiarities of the cult, attracted the researcher, included cultural and historical processes led to special veneration of St Michael Archangel in certain periods, to a specific legendary tradition connected to his name, and even typical place for his churches. All those peculiarities allowed the author to suppose that the cult of St Michael had some characteristic relation to religious and social moods of the epoch. Calling for the sources of such veneration, D.-R. tried not only to trace the development of the cult, but also to formulate “the regularities of mythological images, in general, and particularly — of the religious evolution of Middle Ages”. Thus, there is a comparative and historical analyze of the common features of veneration of god Mercury and St Michael Archangel, whose cult was difficult for the Christianization and deeply insert in folk beliefs. Studying of the legendary material, special cult places connected to St Michael, as well as historical and national specifics of such veneration were described in the following chapters of the book. Tracing the historical route of the cult of St Michael Archangel form Palestine to Britain, the author tried to answer the question of the possibility of replacing local pagan cults with that one of St Michael; she studied its development in the epoch of the Crusades, and analyzed some connections between political and state purposes to the development of the cult, as well as the process of shaping the peculiar features of St Michael Archangel in its interrelations with the story of Jeanne of Arc.