The title "Duke of Östergötland" is a noble title in Sweden, traditionally granted to members of the royal family. Östergötland is a historical province located in the southeastern part of the country, known for its rich cultural heritage and beautiful landscapes. The title has been held by various Swedish princes throughout history, symbolizing their connection to the region. Currently, the title is held by Prince Carl Philip, the son of King Carl XVI Gustaf. As Duke, he participates in various ceremonial duties and represents the royal family in the province. The title is part of Sweden's monarchy, which plays a significant role in the nation's history and culture.