The Duchy of Alençon was a historical territory in northwestern France, established in the 10th century. It became a significant feudal domain, known for its strategic location and agricultural wealth. The duchy was ruled by various noble families, contributing to the political landscape of medieval France. In the 15th century, the duchy gained prominence through its association with Joan of Arc, who was born in the nearby region. The Duchy of Alençon played a role in the Hundred Years' War, and its influence waned after the French crown absorbed it in the late 16th century.