Jean Baptiste Point du Sable (or Point de Sable, Point au Sable, Point Sable) is widely regarded as the first permanent resident of Chicago, Illinois. Little is known of his life prior to the 1770s. In 1779, he was living on the site of present-day Michigan City, Indiana when he was arrested by the British military on suspicion of being an American sympathizer. In the early 1780s he worked for the British lieutenant-governor of Michilimackinac on an estate at what is now the city of St. Clair, Michigan before moving to settle at the mouth of the Chicago River. He is first recorded living in Chicago in early 1790, having apparently become established sometime earlier. He sold his property in Chicago in 1800 and moved to St. Charles, Missouri, where he died on August 28, 1818. He has become known as the "Founder of Chicago" and the place where he settled at the mouth of the Chicago River in the 1780s is recognized as a National Historic Landmark, now located in Pioneer Court.