Count Henry III of Luxembourg was a nobleman who lived during the 13th century. He was born around 1280 and belonged to the House of Luxembourg, a prominent family in European history. Henry III played a significant role in the politics of the Holy Roman Empire and was known for his efforts to expand his family's influence. Henry III was the son of Count Henry II of Luxembourg and Margaret of Brabant. He became the Count of Luxembourg in 1288 and was involved in various military campaigns. His reign contributed to the establishment of Luxembourg as an important political entity in medieval Europe.