A Seated Saint Reading from a Book Wall Art

"A Seated Saint Reading from a Book" by Francesco Botticini (Francesco di Giovanni), late 15th century. Brush and brown ink, brown wash, heightened with white (partly oxidized); horizontal lines in black chalk (?); pricked for transfer; outlines reinforced in brown ink, perhaps in the 15th or early 16th century.. Original high-resolution public-domain artwork from The Metropolitan Museum of Art.