Across
- 3. period of division in the Roman Catholic Church (1378-1417)
- 4. large area of unforested grassland in southeastern Europe or Siberia
- 5. ancient city in modern-day Turkey known as Istanbul
- 10. picture or pattern arranged from small colored tiles
- 11. legal code made by emperor Justinian
- 12. based on the greek alphabet, with around a dozen additional letters
Down
- 1. the antire body of Orthodox Christianity
- 2. emperor of Russia before 1917
- 6. biblical figures regarded as "fathers of the human race"
- 7. "Holy Wisdom" church in Constantinople
- 8. paintings of Jesus Christ or another holy figure
- 9. Russian destination for the Ulus Juchi, the western part of the mongol empire