| Emmanuel de Croÿ (1718–1784) - Duke and Lord of Condé | Project financier and decision maker |
| Pierre Louis Georges du Buat (1734–1809) - Military engineer | Construction manager |
| Pierre Contant d’Ivry (1698–1777) - Architect | Author of the original project (1754) |
| Richard Fernet (1735–1810) - Sculptor | Facade decor and audience room |
| Louis Dupommereuille - Carpenter | Construction of the main door |
| Louis Gabriel Taboureau des Réaux (1718–1782) - Hainaut Host | Financial contributor to the project |
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