Madonna and Child with Two Angels and a Donor, ca. 1445, Tempera on wood, gold ground (partly checkered with modern red glazes), Shaped top: overall 57 1/8 x 32 in. (145.1 x 81.3 cm); painted surface 54 1/4 x 32 in. (137.8 x 81.3 cm), Paintings, Giov