The Military Order of St. Henry (Militär-St. Heinrichs-Orden) was a military order of the Kingdom of Saxony, a member state of the German Empire. The order was the oldest military order of the states of the German Empire. It was founded on October 7, 1736 by Augustus III, King of Poland and Elector of Saxony. The order underwent several more revisions over the course of the 19th and early 20th centuries.