The Martyrdom of Saint Symphorian is an 1834 painting by the French artist Jean-Auguste-Dominique Ingres. It shows the death of Saint Symphorian, the first Christian martyr in Gaul. Painted in oil on canvas and measuring 407 x 339 cm, it is now in Autun Cathedral. Although Ingres considered the painting—completed only after ten years of diligent work—one of his crowning achievements, it was criticized harshly when he exhibited it in the Paris Salon of 1834. It subsequently has been considered emblematic of Ingres' misguided ambition to excel as a history painter.