Answer:
Viking Oleg was the founder.
Explanation:
Viking Oleg was the founder of Kievan Rus who established the empire in 9th century. The Kievan Rus was a powerful empire which is founded around the city of Kiev during the Middle Ages. Kievan Rus influenced by the Byzantine Empire instead of Western Europe because the Rus was dependent on Byzantine Empire for their existence in the region and they have the artery of trade which connects the Rus with the Byzantine Empire.
