EN
The article attempts to trace inspirations by the culture of pre-Mongolian Rus’ in the works of father Pavel Florensky (1882-1937), a prominent philosopher of the Russian religious renaissance of the early XXth century. Relying upon Florensky’s writings, Old Russian literary artefacts and scholarly findings of medievalists (mainly art historians and philologists), the author seeks to highlight an important, albeit somewhat forgotten, source of Florensky’s philosophical teaching - the Christian cultural tradition of Old Rus’. Apparently, it is this tradition that played an essential role in Florensky’s development into an original philosopher, shaping fundamentals of the metaphysics of All-Unity which has been recognized as Florensky’s main philosophical achievement.