| Stanislas Leszczyński - Duke of Lorraine and sponsor | Former King of Poland, initiator of the project. |
| Emmanuel Héré - Chief Architect | Designer of city hall and square. |
| Jean Lamour - Locker and artist | Author of gilded grilles and ironwork. |
| Jean Girardet - Decorative painter | Author of trompe-l'oeil frescoes. |
| Germain Boffrand - Architect and mentor | Emmanuel Herere trainer. |