The Holy Trinity ( recto ); Cross section of an arch ( verso )

Italian School, 17th century The Holy Trinity (recto); Cross section of an arch (verso) inscribed ' [en/ terra/ matoni/ [...] piano che fanno la volta' (verso) pen and brown ink on paper, watermark fleur-de-lys in a circle 8 ¾ x 6 ½ in. (22.1 x 16.5 cm)