A duke is a high-ranking noble title in many countries, often just below a king or queen. Dukes typically oversee large areas of land and have significant influence and power. In the past, they were responsible for governing their territories and maintaining order. Today, the title is often more ceremonial, with dukes participating in royal events and representing their families. In the United Kingdom, for example, the title of duke is one of the oldest and most prestigious. Famous dukes include Duke of Edinburgh and Duke of Cambridge, who are part of the British royal family. Dukes often have elaborate coats of arms and are associated with grand estates and historical traditions.