Armoiries Gilbert Hérail —
Photo Credit: By Odejea, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=3993164

Heinrich Walpot —
Photo Credit: By Unknown author - Bildarchiv Austria, Public Domain, https://commons.wikimedia.org/w/index.php?curid=64951253

Coat of arms of the Teutonic Order — (not that of the grandmaster)
Photo Credit: By Nomadic1 - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=50813211

Flag of Brandenburg —
Photo Credit: By Durero - Own work, CC BY-SA 4.0, https://commons.wikimedia.org/w/index.php?curid=49671680

Malbork Castle — The political center of Prussia until 1466 was the Ordensburg Marienburg (Malbork Castle) in what is now Malbork, Poland

It is the largest castle in the world measured by land area and a UNESCO World Heritage Site.
Photo Credit: By Gregy - Own work, CC BY-SA 3.0 pl, https://commons.wikimedia.org/w/index.php?curid=21824061

Flag of Prussia —
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=4225102

Vladimir Putin — February 20, 2020
Photo Credit: By Kremlin.ru, CC BY 4.0, https://commons.wikimedia.org/w/index.php?curid=87312534

Jahrbuch der Albertus-Universität zu Königsberg —
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=14797905

Christian Goldbach —
Photo Credit: https://dimasadji4.wordpress.com/tag/christian-goldbach/

Pope John XII — In the en:Basilica of Saint Paul Outside the Walls, Rome
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=42553749

Pope Agapetus II — In the Basilica of Saint Paul Outside the Walls, Rome
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=42553733