Portrait of Louis-Philippe, Duc d'Orleans and His Son Louis-Phillipe Joseph, Duc de Chartres. Artist: Louis de Carmontelle (French, Paris 1717-1806 Paris). Dimensions: Sheet: 11 11/16 ? 7 7/8 in. (29.7 ? 20 cm) Plate: 11 5/8 x 7 3/4in. (29.5 x 19.7cm