William Cavendish, 5th Duke of Devonshire (1748-1811), was a British nobleman and politician. He served as the Lord Lieutenant of Ireland and was a prominent member of the Whig party. The Duke was known for his contributions to the arts and architecture, particularly through the development of Chatsworth House, his family estate in Derbyshire. The 5th Duke was also involved in various political matters during his lifetime, including the American Revolutionary War. He was a supporter of the American colonies and advocated for a peaceful resolution. His legacy includes both his political influence and his patronage of the arts, which helped shape the cultural landscape of his time.