“In art, there is no need for color; I see only light and shade.” In a single phrase, the Spanish painter Francisco Goya—who worked in many media, on many subjects, and became known as a bridge figure between the Old Masters and the moderns—summed up his unwavering approach to his wide-ranging art. A new exhibition, on view in Agen’s historic Jacobins’ Church, presents Goya’s work in all its variety while emphasizing the founding aesthetic to which he remained true throughout his career. —J.V.