| Jean-Gabriel Legendre - Bridge and road engineer | Directs the construction of the central body (1759-1764). |
| Jean-Baptiste Bochet de Coluel - Collaborating architect | Realizes the wings and course of Ormesson. |
| Barberie de Saint Contest - Intendant of Champagne (1756) | Project initiator under Louis XV. |
| Nicolas Durand - Architect Collaborator | Participates in initial plans. |
| Jean Evangéliste Poterlet - Architect Collaborator | Involved in design. |
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