"Generate a realistic portrait image of Grand Duke Ernest Louis of Hesse, also known as Ernst Ludwig Karl Albrecht Wilhelm, in his late 40s, dressed in formal attire, including a military uniform and medals, reflecting his status as the Grand Duke of Hesse and by Rhine from 1892 to 1918, with a serious expression and a hint of his artistic side, set against a backdrop that subtly suggests his connection to the arts and his role as a patron."