The Duke of Carinthia was a noble title in the historical region of Carinthia, located in present-day Austria. The title emerged in the early Middle Ages and was held by various rulers who governed the area. Carinthia was significant for its strategic location and rich resources, making it an important duchy within the Holy Roman Empire. Throughout its history, the title was often associated with the House of Sponheim and later the House of Habsburg. The duchy played a crucial role in regional politics and was involved in various conflicts and alliances. The title eventually became obsolete in the 19th century as the political landscape of Europe changed.