| Henri Gutton - Architect engineer | Main building designer, polytechnician. |
| Henry Gutton - Architect, nephew of Henri | Collaborator in project implementation. |
| Frédéric Schertzer - Engineer and contractor | Director of the steel metal structure. |
| Jules Genin et Camille Louis - Sponsors, grain dealers | Initial seed plant owners. |
| Jacques Grüber - Glass and decorator | Author of the glass windows *The Glycines*. |
| Alexandre Bigot - Ceramicist | Supplier of architectural ceramic elements. |
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