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| Date | Type | Code | Nom |
|---|---|---|---|
| 1994-07-01 | Fusion association → fusion simple | 56198 | Rohan |
| 1994-07-01 | Fusion association → fusion simple | 56217 → 56198 | Saint-Gouvry → Rohan |
| 1994-07-01 | Fusion association → fusion simple | 56235 → 56198 | Saint-Samson → Rohan |
| 1974-06-01 | Fusion-association | 56198 | Rohan |
| 1974-06-01 | Fusion-association | 56217 → 56198 | Saint-Gouvry → Rohan |
| 1974-06-01 | Fusion-association | 56235 → 56198 | Saint-Samson → Rohan |
| 1943-01-01 | Création | 56198 | Rohan |