Feudalism in the Holy Roman Empire was a politico-economic system of relationships between liege lords and enfeoffed vassals (or feudatories) that formed the basis of the social structure within the Holy Roman Empire during the High Middle Ages. In Germany the system is variously referred to Lehnswesen, Feudalwesen or Benefizialwesen. The highest liege lord was the sovereign, the king or duke, who granted fiefs to his princes. In turn, they could award fiefs to other nobles, who wanted to be enfeoffed by them and who were often subordinate to the liege lord in the aristocratic hierarchy.