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