Frederick I, Holy Roman Emperor
Biography
He was crowned King of the Romans at Aachen several days later, on 9 March 1152. Frederick's father was from the Hohenstaufen family, and his mother was from the Welf family, the two most powerful families in Germany. The Hohenstaufens were often called Ghibellines, which derives from the Italianized name for Waiblingen castle, the family seat in Swabia; the Welfs, in a similar Italianization, were called Guelfs.
Frederick I, Holy Roman Emperor-15