Byzantine and Russian Empires

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Across
  1. 4. the Russian prince who made a legal code
  2. 6. an alphabet used by the Slavs in the East
  3. 9. raiding farmers from Scandinavia
  4. 10. the head of the Byzantine Catholic Church
  5. 11. the people of Russia and Eastern Europe
  6. 12. Where Oleg comes from
  7. 13. The grandest church in Constantinople
Down
  1. 1. a small statue for praying
  2. 2. to kick someone out of the church
  3. 3. a split between two groups with different ideas
  4. 5. the Byzantine Emperor who gained back the empire
  5. 7. the capital of the Byzantine empire
  6. 8. the name of the Emperor in Russia