Statue of Otto IV — old city hall, Braunschweig, c. 1455
Photo Credit: By Brunswyk - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=26300881

Trifels Castle — Medieval castle at an elevation of 500 m (1,600 ft) near the small town of Annweiler, in the Palatinate region of southwestern Germany.
Photo Credit: By R.Wallenstein at German Wikipedia - Own workOriginally from de.wikipedia, CC BY-SA 2.0 de, https://commons.wikimedia.org/w/index.php?curid=2232357

Richard the Lionheart submits himself to Emperor Henry —
Photo Credit: By Petrus de Ebulo - Gerd Althoff, Hans Werner Goetz, Ernst Schubert –- Menschen im Schatten der Kathedrale, Darmstadt: Primus Verlag 1998 S. 18 (Scan) Public Domain, https://commons.wikimedia.org/w/index.php?curid=6108159

Flag of Sicily — cropped
Photo Credit: By Own work - Own work, File:Arms of King Manfred of Sicily.svg by User:Heralder, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=77515915

Constance, Queen of Sicily —
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=299548

Heinrich VI - Konstanze von Sizilien —
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=299548

Pope Celestine III crowning Henry VI with his feet — He was only crowned after promising to cede Tusculum.
Photo Credit: By John Foxe (publisher) - Public Domain, https://commons.wikimedia.org/w/index.php?curid=33480998

Henry VI, Holy Roman Emperor —
Photo Credit: By Master of the Codex Manesse (Foundation Painter) - Public Domain, https://commons.wikimedia.org/w/index.php?curid=189038

Lothair III, Holy Roman Emperor — in the Codex Eberhardi, Fulda monastery 1150/60
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=30426900

Queen Victoria with the Princess Royal, ca. 1844-45 —
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=11617960

Victoria's wedding — by John Phillip
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=32200437