Pope Sergius III — In the Basilica of Saint Paul Outside the Walls, Rome
Photo Credit: By Unknown - Public Domain, https://commons.wikimedia.org/w/index.php?curid=42553298

Pope Christopher —
Photo Credit: By Unknown - Basilica de San Paulo fuori le Mura, Roma, Public Domain, https://commons.wikimedia.org/w/index.php?curid=13303903

Pope Leo V — In the Basilica of Saint Paul Outside the Walls, Rome
Photo Credit: By Unknown - Public Domain, https://commons.wikimedia.org/w/index.php?curid=42553224

Pope Benedict IV — In the Basilica of Saint Paul Outside the Walls, Rome
Photo Credit: By Unknown - Public Domain, https://commons.wikimedia.org/w/index.php?curid=42553208

Pope John IX — In the Basilica of Saint Paul Outside the Walls, Rome
Photo Credit: By Unknown - Public Domain, https://commons.wikimedia.org/w/index.php?curid=42553198

Pope Theodore II — In the Basilica of Saint Paul Outside the Walls, Rome
Photo Credit: By Unknown - Public Domain, https://commons.wikimedia.org/w/index.php?curid=42553188

Pope Romanus — In the Basilica of Saint Paul Outside the Walls, Rome
Photo Credit: By Unknown - Public Domain, https://commons.wikimedia.org/w/index.php?curid=42553167

Flag of Germany —
Photo Credit: Public Domain, https://en.wikipedia.org/w/index.php?curid=33285421

Treaty of Verdun Memorial — Mémorial du Traité de Verdun à Fontenoy-en-Puisaye (Yonne, France)
Photo Credit: By François GOGLINS - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=50060453

Treaty of Verdun —
Photo Credit: By Szajci - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=67465415

Treaty of Verdun — The parting of Carolingian Empire by the Treaty of Verdun in 843. Pink area indicates West Francia.Green area indicates Middle Francia.Yellow area indicates East Francia.
Photo Credit: By Scan made by Olahus - Histoire Et Géographie - Atlas Général Vidal-Lablache, Librairie Armand Colin, Paris, 1898., Public Domain, https://commons.wikimedia.org/w/index.php?curid=5247494