0 Euro - Castelul Karolyi - Carei

Euro Souvenir notes are an officially licensed collector product authorized by the European Central Bank, allowing cultural and tourist sites across the eurozone — and, in some cases, EU-adjacent countries — to issue commemorative zero-denomination pieces that mimic genuine euro banknote aesthetics without holding any monetary value. Oberthur Fiduciaire's involvement lends these otherwise ephemeral items genuine security printing credentials: the paper, thread, and production standards are broadly consistent with commercial banknote manufacture.

Károlyi Castle in Carei, northwestern Romania, was the ancestral seat of the Hungarian Károlyi noble family for several centuries. The building as it now stands reflects extensive 19th-century Neo-Gothic remodeling of an earlier structure.