Flag of Imperial Russia —
Photo Credit:

Casanova's Escape — Illustration in Casanova's Histoire de ma fuite des prisons de la République de Venise qu'on appelle Les Plombs (Story of my Flight), 1787. From the German edition, 1788.
Photo Credit: By Engraver, 1787 - From original edition. Bibliothèque nationale de France, Public Domain, https://commons.wikimedia.org/w/index.php?curid=24654459

Jeanne Marquise d’Urfé —
Photo Credit: By Unknown - http://aulivrebleu.pagesperso-orange.fr/Urfe.html, Public Domain, https://commons.wikimedia.org/w/index.php?curid=21814054

"It's him. Place him in custody!" — Frontispiece illustration of Casanova's History of my Flight from the Prisons of the Republic of Venice. (1787, dated 1788)
Photo Credit: By Engraver, 1787 - From original edition, Bibliothèque nationale de France, Public Domain, https://commons.wikimedia.org/w/index.php?curid=24696005

Casanova —
Photo Credit: By Johann Berka - Public Domain, https://commons.wikimedia.org/w/index.php?curid=2337181

Louis XVII of France —
Photo Credit: By Alexander Kucharsky - Public Domain, https://commons.wikimedia.org/w/index.php?curid=1056851

Louis de France, dauphin —
Photo Credit: By Maurice Quentin de La Tour - Public Domain, https://commons.wikimedia.org/w/index.php?curid=12059972

Decoration for a Masked Ball at Versailles — c.1860 from a 1764 plate
Photo Credit: By Charles Nicolas Cochin I - Public Domain, https://commons.wikimedia.org/w/index.php?curid=24835105

Madame de Pompadour —
Photo Credit: By François-Hubert Drouais - Public Domain, https://commons.wikimedia.org/w/index.php?curid=3184790

Frederick the Great defeats the French — Battle of Rossbach, 5 November 1755
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=29367712

Frederick's marriage to Elisabeth Christine — 12 June 1733 at Schloss Salzdahlum
Photo Credit: By J. G. SchmidtCreator:Johann Georg Schmidt (Kupferstecher) - Public Domain, https://commons.wikimedia.org/w/index.php?curid=30245110