| Jules Génin - Sponsor | Grain merchant, original owner. |
| Camille Louis - Sponsor | Wife of Jules Genin, co-owner. |
| Henri Gutton - Polytechnic engineer | Main builder of the building. |
| Frédéric Schertzer - Manufacturer | Director of the large metal work. |
| Alexandre Bigot - Ceramicist | Author of ceramic elements. |
| Jacques Grüber - Verrier-decorator | Creator of glass windows *Glycines*. |