Grand Dukes are high-ranking nobles, often ruling over large territories within a kingdom. The title is typically found in European history, particularly in countries like Russia and Luxembourg. Grand Dukes held significant power and influence, often serving as governors or leaders of regions, and their status was just below that of a king. The role of a Grand Duke often included managing local affairs, collecting taxes, and maintaining order. They were part of the aristocracy and sometimes played crucial roles in politics and diplomacy. The title is still used today, especially in Luxembourg, where the Grand Duke is the head of state.