FIGURE A1.

Names of portraits used in this study for drawing (Figure 1).

1 Johann Elias Ridinger: Asia. Mezzotint, Braunschweig, Herzog Anton Ulrich-Museum, Germany.	8 Lucas Cranach the Elder: Hercules and Diana’s hind. Oil Painting, 1537, Braunschweig, Herzog Anton Ulrich-Museum, Germany.
2 G. Stein: Representation of different emotional states. Copperplate Engraving, Wolfenbüttel, Herzog August Bibliothek, Germany.	9 Lorenzo Pasinelli: Hercules and Omphale. Oil on canvas, 1649–1700. Braunschweig, Herzog Anton Ulrich-Museum, Gallery of Prints, Germany.
3 Rembrandt: Self-portrait with cap, big eyes and open mouth. Etching and drypoint, 1630, Braunschweig, Herzog Anton Ulrich-Museum, Germany.	10 Cornelis de Vos: Family picture. Oil Painting, 1618. Braunschweig, Herzog Anton Ulrich-Museum, Germany.
4 Rembrandt: Self-portrait with wrinkled forehead. Etching, 1630, Braunschweig, Herzog Anton Ulrich-Museum, Germany.	11 Elias Christoph Heiss: Wilhelmine Amalia, Duchess of Braunscheig-Lüneburg. Mezzotint, 1674–1725. Braunschweig, Herzog Anton Ulrich-Museum, Germany.
5 Rembrandt: Self-portrait with beret. Etching and hand colouring, 1630, Braunschweig, Herzog Anton Ulrich-Museum, Germany.	12 Johannes Esaias Nilson: Leopold Count of Daun. Etching, 1741–1788. Braunschweig, Herzog Anton Ulrich-Museum, Gallery of Prints, Germany.
6 Cornelis Cort: Heracles defeats the Hydra of Lerna. Copperplate Engraving, 1563, Braunschweig, Herzog Anton Ulrich-Museum, Germany.	13 Melchior Küsel: Joseph Furttenbach. Copperplate Engraving, 1651. Braunschweig, Herzog Anton Ulrich-Museum, Gallery of Prints, Germany.
7 Egidius Sadeler: Hercules spins at the Omphale. Copperplate Engraving, 1590–1629, Braunschweig, Herzog Anton Ulrich-Museum, Germany.	14 Georg Friedrich Schmidt: Adrienne Lecouvreur. Copperplate Engraving, 1737–1755. Braunschweig, Herzog Anton Ulrich-Museum, Gallery of Prints, Germany.