Empire of the Middle Ages, 9 letters
By many accounts, it began with Charlemagne, 15 letters
Charlemagne's domain, 15 letters
Charlemagne's legacy, 15 letters
Franconia and Bavaria were once part of it, 15 letters
Otto the Great's domain, 15 letters
Peace of Westphalia party, 1648, 15 letters
Realm of Charles V, 15 letters