The Duchy of Bar was a historical territory located in northeastern France, primarily in the region of Lorraine. It emerged in the 11th century and was ruled by a series of dukes. The duchy played a significant role in the feudal system and was known for its strategic location and economic activities, including agriculture and trade. In 1480, the Duchy of Bar was united with the Duchy of Lorraine through marriage, marking a significant shift in its political landscape. Over the years, it became part of larger territorial entities, ultimately being integrated into the Kingdom of France in the 17th century.