Roman Catholic Diocese of Saint-Paul-Trois-Châteaux
The former French Roman Catholic Diocese of Saint-Paul-Trois-Châteaux (Latin: Dioecesis Sancti Pauli Tricastinorum; French: Diocèse de Saint-Paul-Trois-Châteaux), sometimes, just like the town, also known as the Diocese of Saint-Paul-en-Tricastin (Latin: Dioecesis Sancti Pauli Tricastinorum; French: Diocèse de Saint-Paul-en-Tricastin), existed from the sixth century to the French Revolution.
Its see was at Saint-Paul-Trois-Châteaux, in the modern department of Drôme, southern France. Its territory was included in the expanded Diocese of Valence, by the Napoleonic Concordat of 1801.