Ingres exhibited in the Salon of 1833, where his portrait of "Louis-François Bertin" (1832) was a particular success. The public found its realism spellbinding, although some of the critics declared its naturalism vulgar and its colouring drab. In 1834 he finished a large religious painting, "The Martyrdom of Saint Symphorian", which depicted the first saint to be martyred in Gaul. The painting was commissioned in 1824 by the Ministry of the Interior for the Cathedral of Autun, and the iconography in the picture was specified by the bishop. Ingres conceived the painting as the summation of all of his work and skill, and worked on it for ten years before displaying it at the 1834 Salon. He was surprised, shocked and angered by the response; the painting was attacked by both the neoclassicists and by the romantics. Ingres was accused of historical inaccuracy, for the colours, and for the feminine appearance of the Saint, who looked like a beautiful statue. In anger, Ingres announced that he would no longer accept public commissions, and that he would no longer participate in the Salon. He later did participate in some semi-public expositions and a retrospective of his work at the 1855 Paris International Exposition, but never again took part in the Salon or submitted his work for public judgement. Instead, at the end of 1834 he returned to Rome to become the Director of the Academy of France.