The House of Julich-Berg was a noble family in the Holy Roman Empire, primarily known for its rule over the regions of Jülich and Berg in present-day Germany. Established in the late 12th century, the family played a significant role in the politics of the region, often engaging in alliances and conflicts with neighboring territories. The family's most notable member was William the Rich, who expanded their influence in the 15th century. The House of Julich-Berg eventually became part of the larger House of Cleves through marriage, which further shaped the political landscape of the area during the Renaissance.