Byzantine and Russian Empire

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Across
  1. 4. the panel created this single, uniform code
  2. 7. created Cyrillic alphabet
  3. 8. handwritten books
  4. 10. declare to be an outcast of the church
  5. 12. ancient trade route between china and med. sea
  6. 13. extensive plain without trees
  7. 16. Russian version of caesar
  8. 17. abstaining from sexual relations
  9. 18. people from the forests north of the Black sea
  10. 19. had a 43 year reign
  11. 20. leading bishop of the east
Down
  1. 1. Vladimir's son
  2. 2. succeeded his uncle to the throne of the eastern empire
  3. 3. came to throne about 980
  4. 5. many slavic languages write using this
  5. 6. largest city and former capital of turkey
  6. 9. eastern christian church headed by a patriarch
  7. 11. styles of painting, design, and architecture
  8. 14. means "holy wisdom" in Greek
  9. 15. religious images to aid devotions