Across 4. Predecessor of modern France 7. Latin for "wonder of the world" and also a name given to Frederick II 9. Emperor that led the Sixth Crusade, who was excommunicated 3 times and accepted people of other religions into his court 11. Name of the King of the Franks 15. Emperor who accepted Protestant demands because he was already dealing with other enemies 17. Alternate name of the first emperor of the Staufer Dynasty 18. The emperor who caused the Thirty Years' War. 19. Name of the family line of the Austrian Holy Roman emperors, who were also the last dynasty to rule before the empire's collapse.

Down 1. The agreement that was made in 1122, which gave the pope the power to appoint abbots, bishops, and the next pope. 2. Name of the river that Frederick I drowned in 3. Alternate name of Middle Francia 5. Period of time that took place during the 60 years after the end of the Staufer Dynasty 6. City that was reclaimed during the Second Crusade by means of diplomacy 8. Duchy incorporated into the Holy Roman Empire during the rule of the Saxon Dynasty 9. First emperor of the Staufer Dynasty 10. The state that formed Germany 12. Duchy incorporated into the Holy Roman Empire during the rule of the Salian Dynasty 13. First official emperor of the Holy Roman Empire 14. The nation that weakened the Holy Roman Empire, which was a factor that led to its fall in 1806. 16. City involved in Second Crusade