| Jean Cimard - Master mason | Co-constructor of the Council Chamber (1714). |
| Claude Ravot - Master mason | Co-constructor of the Council Chamber (1714). |
| François Ravot - Mason | Author of the Chambers of the Registry (1731). |
| Jean-Baptiste Bonnet - Master mason | Responsible for the work of 1776-1777. |
| Jacques Jolliot - Carpenter | Participation in the work of 1776-1777. |
| François Jolliot - Carpenter | Participation in the work of 1776-1777. |
| Louis Mény - Sculptor | Author of sculpted window keys. |
| Malbert - Deputy engineer of the Bridges and Chaussées | Modified the work plans (1776). |
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