The article is devoted to the source features of a unique documentary complex – the correspondence of two major Russian historians S.F. Platonov (1860–1933) and M.M. Bogoslovsky (1867–1929). The epistolary dialogue of scientists is of considerable interest not only in terms of studying their life and work. The confidential correspondence reflects significant events in the scientific and social life of Russia, Moscow, Petersburg-Petrograd-Leningrad. Correspondence is a valuable historical and historiographic source not only for understanding the development of historical science in Russia, the formation of Moscow and St. Petersburg historical schools, but also for studying the public consciousness of the Russian humanitarian intelligentsia at the end of the 19th — first third of the 20th centuries, in-depth knowledge of the culture of a turning point in the history of Russia. The letters contain valuable information about the everyday life and life of the professors, the organization of scientific life at the Academy of Sciences, the Archaeographic commission, at Moscow university and the Moscow theological academy, at the Moscow higher courses for women, at the Institute of history of the RANION, the Historical Museum, other higher educational institutions and scientific societies two capitals, they reflect the international ties of domestic historical science with scientists from Great Britain, Germany, France, USA, Czech Republic.
Correspondence of S.F. Platonov and M.M. Bogoslovsky
