Simplify the following text for a Grade 11 native English-speaking person.
Original: The Gorgon imagery remained popular even in Christian times , especially in the Byzantine Empire , including Kievan Rus , and was revived in the West by the Italian Renaissance artists .
Simplified: The Gorgon image remained popular even in Christian times , especially in the Byzantine Empire , including Kievan Rus ( now the Ukraine ) . The image was used in Western Europe by the Italian Renaissance artists .