Huns — Taken from emblem on Figure of Attila in a museum in Hungary - Image scaled and cropped by alasnome
Photo Credit: By A.Berger - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=7362503

Figure of Attila — in a museum in Hungary
Photo Credit: By A.Berger - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=7362503

Battle of Andernach — Miniature of the battle of Andernach between Charles the Bald and Louis, his nephew. Image taken from f. 231v of Chroniques de France ou de St Denis.
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=69915743

Bruno, Duke of Saxony —
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=8297219

Otto I, Duke of Saxony —
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=8297169

Gandersheim Abbey church —
Photo Credit: By Misburg3014 - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=7843431

Liudolf — From a 12th-century manuscript of the chronicle of Ekkehard of Aura
Photo Credit: Public Domain, https://en.wikipedia.org/w/index.php?curid=55410510

Liutgard von Sachsen —
Photo Credit: By Anonymous - File:StammtafelOttonen0002.jpg, Public Domain, https://commons.wikimedia.org/w/index.php?curid=8297016

Louis III the Younger, King of Eastren Franks —
Photo Credit: By Ekkehard von Aura - Public Domain, https://commons.wikimedia.org/w/index.php?curid=41021915

Flag of Lorraine —
Photo Credit: By Patricia.fidi - Own work, CC0, https://commons.wikimedia.org/w/index.php?curid=537217

Stem duchies of the German kingdom 919-1125 — By William R. Shepherd (died 1934) - The Historical Atlas by William R. Shepherd, 1923.
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=2009655