Count John I of Hainaut was a nobleman who ruled from 1280 until his death in 1304. He was part of the House of Avesnes and played a significant role in the politics of the Low Countries during the late 13th century. His reign was marked by efforts to strengthen his territory and maintain peace among the various feudal lords. John I was also known for his connections to other European nobility, including his marriage to Philippa of Luxembourg, which helped to solidify alliances. His leadership contributed to the development of Hainaut as an important region in medieval Europe, influencing trade and culture.