The Dukes of Lancaster is a title in the British nobility, historically associated with the region of Lancashire. The title was first created in 1351 for Henry of Grosmont, and it has been held by various members of the royal family, including King Henry IV, who was the first king from the House of Lancaster. The dukedom is linked to the Lancaster family, which played a significant role in the Wars of the Roses. Today, the title is unique because it is held by the reigning monarch, currently King Charles III. The Duchy of Lancaster, a portfolio of land and assets, provides income to the monarch and is separate from the Crown Estate. The Dukes of Lancaster symbolize the historical significance of the Lancaster lineage in British history.