The Duchy of Piacenza was a historical state in northern Italy, established in the 14th century. It was part of the larger Duchy of Milan and played a significant role in the political landscape of the region. The duchy was known for its strategic location and agricultural wealth, which contributed to its importance during the Renaissance. Throughout its history, the Duchy of Piacenza changed hands among various noble families and was influenced by external powers, including the Spanish Empire. It eventually became part of the Duchy of Parma in the 18th century, marking the end of its independent status.