Jülich-Cleves-Berg was a historical territory in the Holy Roman Empire, located in what is now western Germany. It was formed in the late 15th century and included regions around the towns of Jülich, Cleves, and Berg. The territory played a significant role in the political landscape of the region, especially during the conflicts of the Reformation and the Thirty Years' War. The territory was ruled by various noble families, including the House of Jülich and the House of Cleves. In the 17th century, it became part of the Duchy of Cleves and later was integrated into the Prussian state. Today, the historical significance of Jülich-Cleves-Berg is recognized in the context of regional history and heritage.