The collection contains materials from the IX (Moscow) International Seminar of Historical Research "From Rome to the Third Rome," which discussed the topic "Roman-Constantinople heritage in Russia: the idea of ​ ​ power and political practice." It was held in Moscow on May 29-31, 19S9 and was a continuation of the Roman seminar of the same year. IX seminar became the second Moscow seminar. Political and legal subjects were again discussed at it, but already in the predominant appeal to Russian history. His goal was to find out the degree of influence of the Roman-Constantinople heritage on the development of state institutions and political ideas in Russia in the era of the creation and strengthening of the national state.