Portrait of a Man with a Blue Chaperon (1430) by Jan van Eyck depicts a man in a blue headdress presenting a ring. Artists did not title their works in the Northern Renaissance period, so his name and true profession have been lost. As such the painting has attracted several titles: Portrait of a Man with a Blue Hood, Portrait of a Jeweler, and Man with a Ring. The painting is not signed or dated by van Eyck. Albrecht Dürer's signature "AD 1492" appears in the top left, likely added by an unscrupulous dealer to increase the value at a time when Dürer was in demand. The painting was attributed to van Eyck in the late 19th century, and in 1991 infrared photography revealed underlying methods that are unmistakably van Eyck's. Other elements typical of van Eyck are the attention to detail, texturing of the face and clothing, and use of illusion: the right hand with ring appears to project out of the painting, while the left hand rests on the lower frame.