Across
- 2. Writing system used in Russia and nearby countries
- 6. Split between Eastern and Western Christian churches
- 8. Branch of Christianity in Eastern Europe
- 10. Pictures made with tiny colored pieces
- 11. Laws made by Emperor Justinian
- 12. Large flat grassland
Down
- 1. Leader of the Orthodox Church
- 3. Famous church in Constantinople
- 4. Russian emperor or ruler
- 5. Capital city of the Byzantine Empire
- 7. Mongol rulers of Russia
- 9. Holy religious images