| Charles Lebeuffe - Architect | Co-conceptor of washing with Renahy. |
| Adrien Renahy - Architect | Co-author of the architectural project. |
| Patret - Forging master | Director of cast iron elements. |
| Guillemin - Entrepreneur | Participation in construction. |
| Louis Humbert - Architect | Supervision of restorations (1906, 1925). |