Byzantine cultural influences

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Across
  1. 2. who was the Byzantine missionary?
  2. 5. what empire were Greek and Roman traditions preserved?
  3. 7. where was the capital of the Eastern Roman Empire established?
  4. 8. what is the biggest country that still uses the Slavonic alphabet?
Down
  1. 1. what group introduced literacy to Eastern Europe?
  2. 3. what was the name of the alphabet Cyril created?
  3. 4. which saint do we celebrate on March 17th?
  4. 6. who made the Justinian Code?