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Interior view of the Hall of the Knights at Pierrefonds Castle, showing a large vaulted hall, panelled walls, and stained-glass windows. Printed text at the bottom: 'CHATEAU DE PIERREFONDS. — Hall of the Knights. — LL.' The reverse features a 20-cent postage stamp, a circular cancellation from Château-Gaillard (Eure) dated 28 March 1902, and handwritten text dated 28 March 1902.