The Duke of Orléans is a title in the French nobility, historically associated with the House of Orléans, a branch of the royal family. The title has been held by various members, including Louis-Philippe, who became King of the French in 1830. The Duke often played significant roles in French politics and society, especially during the 18th and 19th centuries. The title has seen several notable holders, such as Philippe Égalité, who supported the French Revolution but was later executed. The Duke of Orléans remains a symbol of the complex history of the French monarchy and its various factions.