| Charles-François Touros de Millon - Chief Engineer | Author of the plans in 1730 |
| Arnould de Guillemard - Architect of the work of the king | Work supervisor at Longwy |
| Sieur Lestrade - Entrepreneur | Site Manager (Metz) |
| Antoine Guillemard - Master arquebusier | Grid supplier (1746) |
| Sieur des Robert - Chief Engineer | Receipt of works in 1746 |
| Guet - Architect (Good Arts) | Directed the restoration (1927-1930) |
| Zimmermann - Local architect | Guet representative in Longwy |
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