The Dukes of Brunswick-Lüneburg were a noble family that ruled over the regions of Brunswick and Lüneburg in northern Germany. Their reign began in the late Middle Ages and continued into the early modern period. The dukes played a significant role in the political landscape of the Holy Roman Empire and were known for their influence in trade and commerce. The dynasty was divided into several branches, with notable dukes such as Ernest the Confessor and George William. The Dukes of Brunswick-Lüneburg contributed to the cultural and economic development of their territories, leaving a lasting legacy in the region.