- emperor of the Holy Roman Empire 1452–93; as Frederick IV , king of Germany 1440–93.
- elector of Saxony 1486–1525: protector of Martin Luther.
- 1415–93, Holy Roman Emperor (1452–93) and, as Frederick IV, king of Germany (1440–93)
- called the Wise . 1463–1525, elector of Saxony (1486–1525). He protected Martin Luther in Wartburg Castle after the Diet of Worms (1521)
