| Gabriel de Fontfreyde - Clermontese merchant and rebuilder | The hotel was transformed in the 16th century. |
| Jean de Fontfreyde - Son of Gabriel, modifier of the staircase | Widens the staircase in screws around 1578. |
| Gabriel Ruprich-Robert - Chief Architect of Historic Monuments | Directed the restoration of the 1920s. |
| Henri du Ranquet - Archaeologist and curator | Founded the Ranquet Museum in 1921. |
| Adrien Baratte - Clermont Master Glass | Realized the historic stained glass windows in 1920. |