Frederick III

noun
1.
1415–93, emperor of the Holy Roman Empire 1452–93; as Frederick IV, king of Germany 1440–93.
2.
("the Wise") 1463–1525, elector of Saxony 1486–1525: protector of Martin Luther.
British Dictionary definitions for Frederick III

Frederick III

noun
1.
1415–93, Holy Roman Emperor (1452–93) and, as Frederick IV, king of Germany (1440–93)
2.
called the Wise. 1463–1525, elector of Saxony (1486–1525). He protected Martin Luther in Wartburg Castle after the Diet of Worms (1521)