| H. Degré - Dijon architect | Directed the reconstruction of 1859-1862. |
| Schanosky - Sculptor | Realized the flagship of the arrow in 1878. |
| L. Seguin - Architect (project not accepted) | Offered a quote in 1846. |
| Fénéon-Damotte - Architect (projects not retained) | Three proposals in 1854-1855. |