Vision of Constantine, copy after a drawing by Giacinto Gimignani Wall Art

"Vision of Constantine, copy after a drawing by Giacinto Gimignani" by Anonymous, Italian, Roman-Bolognese, 17th century, 17th century. Black chalk (?), brush and gray wash, over leadpoint (?) underdrawing on light tan paper; framing lines in black chalk (?) over leadpoint (?). Original high-resolution public-domain artwork from The Metropolitan Museum of Art.