Receiving Christianity only in 988/9, the East Slavic Rus' expressly appropriated art and architecture based on Byzantine models and elaborated their own styles. *Kiev, *Novgorod, and *Vladimir (Suzdalia) define the major foci of Rus' accomplishments in the pre-Mongolian period, before the 1230s. Only after the battle at *Kulikovo (1380) did monumental arts revive. And only when Prince Ivan the Great (r. 1462–1505) commissioned architects Aristotele Fioravanti and Alevisio Novi to work in the *Kremlin did the Italian Renaissance significantly influence Russian architecture.