| Saint Gobrien - Bishop of Vannes and hermit | Founded the oratory in 717 |
| Olivier de Clisson - Noble sponsor | Completed work around 1378-1387 |
| Marguerite de Rohan - Wife of Olivier de Clisson | Arms visible in the windows |
| I. Carel - Fabricien (manager) | Cited in the inscription of 1549 |
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