An Angel Appearing to Saint Catherine of Alexandria in Prison (recto); Volute (verso)

Anonymous, Spanish, School of Seville, 17th century · 17th century · Pen and brown ink with brush and brown wash, highlighted with white gouache (now mostly oxidized) over traces of black chalk (recto). Composition outlined with graphite. On light beige paper. Red chalk (verso)

From the collection of The Metropolitan Museum of Art. Free to download, adapt and use — no permission needed.