A dukedom is a territory or domain ruled by a duke or duchess, typically within a monarchy. Dukedoms are often hereditary, meaning they are passed down through generations within noble families. The title of duke is one of the highest ranks in the British peerage system, often associated with significant land ownership and social status. In many countries, including England and France, dukedoms have historical significance, often linked to feudal systems where dukes governed large areas on behalf of the monarch. The role of a duke can include political responsibilities, military leadership, and ceremonial duties, reflecting their importance in the aristocratic hierarchy.