The Volto Santo of Lucca Wall Art

"The Volto Santo of Lucca" by Anonymous, Italian, Tuscan, 16th century, 16th century. Pen and dark brown ink, brush and brown wash, over traces of black chalk on light tan paper; squared in black chalk (with some corrections to squaring grid); framing lines in pen and dark brown ink apparently by artist. Original high-resolution public-domain artwork from The Metropolitan Museum of Art.