Frederick I, Holy Roman Emperor — German Royalty died on December 30, 1190

Frederick I, also known as Frederick Barbarossa, was the Holy Roman Emperor from 1155 until his death. He was elected King of Germany at Frankfurt on 4 March 1152 and crowned in Aachen on 9 March 1152. He became King of Italy in 1155 and was crowned Roman Emperor by Pope Adrian IV on 18 June 1155. Two years later, the term sacrum first appeared in a document in connection with his Empire. He was later formally crowned King of Burgundy, at Arles on 30 June 1178. He got the name Barbarossa from the northern Italian cities he attempted to rule: Barbarossa means "red beard" in Italian; in German, he was known as Kaiser Rotbart, which has the same meaning... (wikipedia)

It is not for the people to give laws to the prince, but to obey his mandate.
On Earth, God has placed no more than two powers, and as there is in Heaven but one God, so is there here one Pope and one Emperor. Divine providence has specially appointed the Roman Empire to prevent the continuance of schism in the Church.
Since by the ordination of God I both am called and am Emperor of the Romans, in nothing but name shall I appear to be ruler if the control of the Roman city be wrested from my hands.