Frederick III (1415-1493), Holy Roman emperor and German king from 1440 to 1493, was one of the longer-reigning and weaker of the Hapsburgs. His misfortunes spurred his family to strengthen their position. He was the last German emperor crowned by the pope in Rome.

Frederick III was born on Sept. 21, 1415, in Innsbruck. His father was Ernest, Duke of Austria, a title to which Frederick succeeded (as Frederick V) in 1424. The young prince developed interests in jewels, which he collected, and astrology, and study which did little to further his fortunes. Frederick was raised to the imperial office in June 1440, when he was crowned king of the Romans (that is, the Germans; the German king was not officially emperor until crowned by the pope) in Aachen to succeed his cousin, Albert II. Frederick was noted for his lack of leadership in the internal affairs of Germany. Rejecting the appeals of princes...