Claude Chastillon or Chatillon[1] (1559 or 1560 – 27 April 1616) was a French architect, military and civil engineer, and topographical draughtsman, who served under Henry IV of France. His most notable work, Topographie françoise, published posthumously in 1641, is a collection of 500 views of French towns and buildings and constitutes a unique, if partial, historical account of French topography and architecture at the beginning of the 17th century.[2]