The Duchy of Reggio was a historical state located in southern Italy, specifically in the region of Calabria. It was established in the Middle Ages and became part of the larger Kingdom of Naples. The duchy was known for its strategic coastal position and agricultural production, particularly in olives and wine. In the 16th century, the Duchy of Reggio was ruled by various noble families, including the House of Carafa. The duchy played a role in the political and cultural developments of the region, contributing to the rich history of southern Italy before eventually being absorbed into the Kingdom of Italy in the 19th century.