The title "Duke of Berg" refers to a noble title in the historical region of Berg, located in present-day Germany. The title was established in the early 19th century and was held by various members of the House of Berg, a prominent noble family. The dukedom played a significant role in the political landscape of the region during its existence. The Duke of Berg was often associated with the broader context of the Rhineland and the Napoleonic Wars. The title was briefly elevated to a grand duchy in the early 19th century but eventually became part of the Prussian territories after the Congress of Vienna in 1815.