0 Euro - Musée D'Arromanches D-Day et Bataille de Normandie

Zero-euro souvenir notes occupy an odd corner of notaphily — legal in format, worthless by design, and printed to the same security specifications as genuine currency by Oberthur Fiduciaire under license from the European Central Bank. This example was issued by the Arromanches museum, which sits directly above what remains of the Mulberry B artificial harbour — the prefabricated British structure towed across the Channel in June 1944 and still partially visible offshore today.

The conceit of denominating a D-Day memorial piece at zero is, depending on your view, either apt or absurd.