The Duchy of Amalfi was a maritime state located on the southwestern coast of Italy, flourishing from the 9th to the 11th centuries. It was known for its powerful navy and trade networks, connecting the Mediterranean and beyond. The duchy played a significant role in the development of maritime law and commerce during the Middle Ages. The capital of the duchy, Amalfi, was a vibrant port city famous for its architecture and cultural contributions. The Amalfi Cathedral, dedicated to Saint Andrew, is a notable landmark. The duchy eventually fell under the control of larger powers, but its legacy in trade and navigation remains influential.