Stirrings of this sentiment began during the reign of Tsar Ivan III, but the idea crystallized with a panegyric letter composed by the Russian monk Filofei in 1510 to Tsar Vasili III, which proclaimed, Two Romes have fallen.
Stirrings of this sentiment began during the reign of Ivan III, Grand Duke of Moscow who had married Sophia Paleologue. The idea crystallized with a panegyric letter composed by the Russian monk Filofei in 1510 to their son Grand Duke Vasili III, which proclaimed, Two Romes have fallen.