Couture was an influential painter of historical and genre subjects, and a teacher.
Hie most famous work, Les Romains de la décadence (1847), is in the Musée d'Orsay. He taught such artists as Henri Fantin-Latour and Pierre Puvis de Chavannes. As a young art student, Whistler painted a Copy after a Group in Couture's 'Romains de la décadence' y018.
In 1867 Couture published a book on his own ideas and working methods called Méthode et entretiens d'atelier (Method and workshop interviews). It was translated as Conversations on Art Methods in 1879.
Encyclopædia Britannica, 11th Edition, 1911; Young, Andrew McLaren, Margaret F. MacDonald, Robin Spencer, and Hamish Miles, The Paintings of James McNeill Whistler, New Haven and London, 1980 .