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 rich resources. In 1480, the Duchy of Bar was united with the Duchy of Lorraine through marriage, marking the end of its independence. The area later became part of France in the 17th century, contributing to the cultural and political landscape of the region.