Particularly noteworthy are the sculptures by Frederick William I , Bartholome Damarath, the sculptor of the Prussian King. Mars with sword and shield and Hercules with mace and leopard skin, and placed over the passage of the panoply of the Prussian Eagle, surrounded by the chain of the Black Eagle and crowned with a royal crown. The gate is adorned with carved elements of armor, armor, shields and banners - it is a reference to the Roman tradition of triumphal triumphs and the hanging of weapons at the gates of cities.