The House of Dampierre was a noble family in medieval France, known for its influence and power during the 12th and 13th centuries. They were originally from the region of Dampierre-en-Yvelines and played a significant role in the feudal system, holding various titles and lands. Members of the House of Dampierre were often involved in the politics of the time, including alliances through marriage and military campaigns. Their legacy includes contributions to the Crusades and the establishment of several fortified castles, which served as important strongholds in the region.