Vierge is noted for his mastery of black and white illustration. His work for publications such as La Vie Moderne relied on sharp, economical lines rather than heavy shading. He used the white of the paper as a structural element. In works like The Pillage of Rouen, he captures complex historical scenes with a sense of motion. His style influenced the development of photomechanical reproduction during the late nineteenth century.

Modern collectors value Vierge for his precise draughtsmanship and his ability to convey drama through ink. His prints offer a window into the aesthetic of the Belle Époque. They maintain a graphic clarity that fits contemporary interiors. The stark contrast of his monochrome works makes them versatile pieces for home galleries.