A journey to Morocco in 1872 strongly influenced his early artistic development and lead him to produce Romantic scenes under the spell of Orientalism.

Among his noted works in this vein are Last Rebels, Justice in the Harem (both in the Luxembourg Gallery), Les Chérifas, and Moroccan Prisoners (Bordeaux).

His large canvas, The Entrance of Mahomet II into Constantinople (Musée des Augustins Toulouse), received a medal in 1876.

Benjamin-Constant painted Pope Leo XIII, Queen Alexandra of the United Kingdom (1901), Lord John Lumley-Savile, and Henri Blowitz (1902).

Along with fellow artists, Nasreddine Dinet, Paul Leroy, Jean-Léon Gérôme and curator/ art historian, Léonce Bénédite, he was one of the founders of the Société des Peintres Orientalistes Français.