In "Khrismologion" ("Book of Prophecy", 1672) he analyzed commentary on the four kingdoms of Daniel prophecy, concluding that, due to its connection with Constantinople, Russia was the only true successor to the fourth kingdom, Rome. Going further, he asserted that the right of Roman succession belonged "only" to Russia, and not to the Holy Roman Empire. In setting forth his claim, he made reference to Anna Porphyrogenita, the sister of Byzantine emperor Basil II, who married Vladimir the Great. In his view, this union not only reinforced the strong connection between Byzantium and Russia, but also drew a dynastic line between Vladimir and Aleksey.