Christoforo Roncalli, called Pomerancio, a bust-length portrait in a twelve-sided frame. Artist: Ottavio Leoni (Il Padovano) (Italian, Rome 1578-1630 Rome). Dimensions: plate: 5 11/16 x 4 1/2 in. (14.5 x 11.4 cm) sheet: 6 11/16 x 4 15/16 in. (17 x 12