Abstarct: The monograph is devoted to the evolution of Russian medieval publicism of 40–80 year of the 16^th century. The book examines the individual author’s concept, built on the basis of a single medieval picture of the world, historiosophy and moral and religious teachings. The study was the result of new interpretations of publicistic texts of the Moscow kingdom. The book also serves as an experience of aesthetic evaluation of these works. The author’s focus turned to the problem of isomorphism, the relationship between the form plan and the content. The study is addressed to medievalists, teachers, philology students, and anyone interested in the history of Old Russian literature.