Sir Peter Paul Rubens (Siegen, Westphalia 1577-1640 Antwerp), Portrait of Ferdinando Gonzaga as a boy; Photo: Christie's Images Ltd., 2011 oil on canvas; 32 x 22¼ in. (81.2 x 56.5 cm.) - Estimate $700,000 - $1,000,000 Provenance/ Presumably painted for...