Pyotr Mikhailovich Bitsilli (1879-1953) - an outstanding medievalist of the St. Petersburg school, the author of brilliant works on the historical and social psychology of the Middle Ages. "Elements of Medieval Culture" is one of the scientist's best works, which gives a general description of a medieval person, his historical and cultural horizons, his perception of the world, reflection and transformation in his mind of the society surrounding him and built by him.