Matthäus Merian the Elder, Perspectival Study with a View of a Medieval City, 1613–50, Pen and black ink, touches of red chalk, The Metropolitan Museum of Art, New York. https://dartabase.art/cite/met/334718

Willem van Swanenburgh, Neptun ridende på to delfiner, 1603–1607, Kobberstik, Statens Museum for Kunst (National Gallery of Denmark), Copenhagen. https://dartabase.art/cite/smk/KKSgb3579