Lorenzo Veneziano (active 1356-1372) (attributed to) - The Madonna of Humility with Saints Mark and John the Baptist - NG3897 - National Gallery

Lorenzo Veneziano; The Madonna of Humility with Saints Mark and John the Baptist; The National Gallery, London; http://www.artuk.org/artworks/the-madonna-of-humility-with-saints-mark-and-john-the-baptist-115724