onrad IV (1228-54), emperor of Germany, of
the house of Hohenstaufen, was the second son of the Emperor
Frederick II. Elected king of the Romans (1237), he governed
Germany during the long absence of his father in Italy, and after
his death (1250) became emperor. Confronted with the enmity of
the Pope, who excommunicated him, he was preparing to invade
Germany at the head of a great army to reestablish his authority
there, when he died of fever at Lavello. [World Wide Illustrated
Encyclopedia, 1935]