Jacques Ignace Hittorff or, in German, Jakob Ignaz Hittorff was a German-born French architect who combined advanced structural use of new materials, notably cast iron, with conservative Beaux-Arts classicism in a career that spanned the decades from the Restoration to the Second Empire.

The Place de la Concorde is one of the major public squares in Paris, France. Measuring 7.6 ha in area, it is the largest square in the French capital. It is located in the city's eighth arrondissement, at the eastern end of the Champs-Élysées.