The Duchy of Friuli was a historical region in northeastern Italy, established in the 8th century. It was part of the Carolingian Empire and later became a significant political entity during the early Middle Ages. The duchy played a crucial role in the defense against invasions from the Avars and Slavs. The capital of the duchy was Cividale del Friuli, which served as an important cultural and administrative center. Over time, the duchy lost its independence and was absorbed into the Holy Roman Empire and later the Venetian Republic, marking the end of its distinct political identity.