Francis I (Francis Stephen; 8 December 1708 – 18 August 1765) was the consort of Maria Theresa of Austria. With his wife, he was the founder of the Habsburg-Lorraine dynasty. From 1728 until 1737 he was Duke of Lorraine, but lost Lorraine when he had to give it to France. He was the father of Marie Antoinette, the Queen of France.