| Auguste Perret - Senior Architect | Designs the central body and colonnade (1952-1954). |
| Jacques Tournant - Associate architect | Finish the tower after Perret's death (1958). |
| Charles Brunet-Debaine - Architect of the previous hotel | Author of the building destroyed in 1944 (1857). |
| Colboc - Architect of extension | Achieves the northern addition (1984-1987). |