Robert of Bar was a nobleman from the region of Bar, located in present-day northeastern France. He was born around 1250 and became known for his role in the political and military affairs of the time, particularly during the conflicts involving the Capetian dynasty. He was a member of the House of Bar, which was a significant noble family in the region. Robert's lineage and alliances through marriage helped strengthen his family's influence in the Holy Roman Empire and beyond, contributing to the complex feudal relationships of medieval Europe.