| Octave de Béhague - Count, initial sponsor | Owner originally from the hotel. |
| Martine de Béhague - Countess of Bearn | Patron, hotel transformer. |
| Gabriel-Hippolyte Destailleur - Architect | Designer of the hotel in 1866. |
| Walter-André Destailleur - Architect | Author of works of 1895-1904. |
| Mariano Fortuny y Madrazo - Decorator | Creator of the Byzantine Hall. |
| Adolphe Appia - Scene engineer | Moderniser of the technical layout. |
| Charles Mutin - Organ factor | Author of the classified organ. |
| Carol II - King of Romania | Buyer in 1939 for the embassy. |