“…We rely on the methodological principles of objectivity, historicism, determinism, alternativeness, reconstruction, developed in the theoretical studies by the following scientists: Charles-Victor Langlois, Charles Seignobos; Robin George Collingwood [6]; Marc Léopold Benjamin Bloch [5]; Peter Lambert and Phillipp Schofield [27]; Abrams Lynn [1]; Brundage Anthony [4]; Gregory Ian, Ell Paul [11]; Hughes-Warrington [14]; Iggers George, Wang Qiang Edward [16]; Akira Iriye [17] [61, p 402-404; 62], afterwards invaluable epistolary material was found in the archives of the Vatican, Vienna, Venice by Ilia Tabaghua, who attached these documents to a monograph published in 1979 [63].…”