Floris III of Holland was a notable figure in the 13th century, serving as the Count of Holland from 1256 until his death in 1289. He was a member of the House of Avesnes and played a significant role in the political landscape of the region. His reign was marked by efforts to strengthen the authority of the countship and expand its territories. Floris III is also known for his involvement in the Frisian Wars, which aimed to consolidate control over the Frisian territories. His leadership helped to establish a more unified Holland, contributing to the development of the region's governance and economy during a time of feudal fragmentation.