0 Euro - Château de Chambord

EuroSouvenir's zero-denomination series launched in France in 2016, with Chambord among the inaugural subjects. These notes carry all the security features of circulating currency — printed by Oberthur Fiduciaire under the same technical standards applied to legal tender — but were conceived entirely as collector pieces, sold at tourist sites for a few euros apiece. The European Central Bank explicitly permits them provided the face value reads zero, which neatly sidesteps counterfeiting law.

Chambord was a logical first-wave choice: the largest château in the Loire Valley, built under Francis I beginning in 1519, and state-owned since 1930.