Conrad III was a medieval German king and Holy Roman Emperor who reigned from 1138 to 1152. He was a member of the Hohenstaufen dynasty and was known for his military campaigns and efforts to consolidate his power within the Holy Roman Empire. Conrad III also participated in the Second Crusade, leading a German army to the Holy Land in an attempt to support the Christian kingdoms there. His reign was marked by conflicts with other nobles and rulers, as well as ongoing struggles to maintain control over the empire.