The Empire of Charlemagne
This Holy Roman Empire included all of what is now Germany (except the eastern third of Prussia), all of what is now Bohemia, Austria (but not Hungary), and all of Italy except the part south of Naples. There were times when part of France and all of the low countries (now Belgium and Holland) also belonged to the Empire. (The mountaineers of Switzerland won their independence from the Empire in the fourteenth century, and formed a little republic.) See [map “Europe in 1540.”]
Europe in 1540
In the Holy Roman Empire, the son of the emperor did not necessarily succeed his father as ruler. There were seven (afterwards nine) “electors” who, at the death of the ruling monarch, met to elect his successor. Three of these electors were archbishops, one was king of Bohemia, and the others were counts of large counties in Germany like Hanover and Brandenburg. It frequently happened that the candidate chosen was a member of the family of the dead emperor, and there were three or four families which had many rulers chosen from among their number. The most famous of these families was that of the Counts of Hapsburg, from whom the present emperor of Austria is descended.
Louis XIV