| Pierre de Dreux (Pierre Mauclerc) - Duke of Brittany (1213–1237) | Sponsor of the first mansion. |
| Jean Ier le Roux - Duke of Brittany (1237–1286) | Grows the north court. |
| Jean II - Duke of Brittany (1286–1305) | Constructed the Tower of the Spider. |
| Jean IV de Montfort - Duke of Brittany (1364–1399) | Strengthen the defenses and gardens. |
| Anne de Bretagne - Duchess and Queen of France | Restore the castle in 1505. |
| Prosper Mérimée - Inspector of Historic Monuments | Classifies the castle in 1840. |
| Diane de Poitiers - Royal favor, owner | Receives the castle in 1543. |
| Raymond Marcellin - President of the Departmental Council | Initiator of the takeover in 1965. |