Illustration tirée de <i>Histoire de France, cours élémentaire</i>, Ernest Lavisse, Armand Colin, 1913, page 177 de l'édition Heath de 1919.
Ernest Lavisse
Lavisse - cours elementaire - 1913 Google Books <a rel="nofollow" class="external free" href="https://books.google.com/books?id=67MMAQAAMAAJ">https://books.google.com/books?id=67MMAQAAMAAJ</a> U. Wisconsin.