Francis IV Joseph Charles Ambrose Stanislaus was Duke of Modena, Reggio, and Mirandola, Duke of Massa and Prince of Carrara, Archduke of Austria-Este, Royal Prince of Hungary and Bohemia, Knight of the Order of the Golden Fleece.

The Duchy of Modena and Reggio was an Italian state created in 1452 located in Northwestern Italy, in the present day region of Emilia-Romagna. It was ruled since its establishment by the noble House of Este, and since 1814 by the Austria-Este branch of the family. The Este dynasty was a great sponsor of the arts, making the Duchy a cultural reference during the Renaissance and Baroque periods.