Φρειδερίκο Α' Χοχενστάουφεν, commonly known as Frederick I of Hohenstaufen, was a significant Holy Roman Emperor who reigned from 1155 to 1190. He was born in 1122 and became known for his efforts to consolidate the power of the empire and strengthen its authority over the Italian territories. His reign marked a period of conflict with the papacy and various Italian city-states. Frederick was also known as Barbarossa, meaning "Red Beard," due to his distinctive appearance. He participated in the Third Crusade and sought to establish a strong central government. His legacy includes the promotion of legal reforms and the enhancement of trade and commerce within the empire.