It’s an Ionic arch raised by architect Mélin and decorated with sculptures by Joseph Sontgen, a German sculptor living in Nancy, who also created lots of decorations in Nancy’s churches.
• On the outside façade, we have military trophies and a representation of battle of Nancy, opposing duke of Burgundy Charles the Bold and duke of Lorraine René II: we can see, on the background, the Craffe's gate!
• On the inner façade, we have medallions, which used to be king of France and Stainville’s blazons, hammered during the Revolution.
But on this façade, the sculptor represented America’s independence: two low-reliefs show the French and their king. On the other side, France and America’s union with the Treaty of Versailles in 1783, who gave the independence to American people.
• At the top, a medallion flanked by Louis XIV’s portrait, carrying by the Independence allegory (a little Black child with the Victory and Glory muses).
• On the left low-relief, people from Lorraine honour France: a genie welcomes the king, another one crowns him. On the right scene, a little Black kid tributes the king of France.