BRUSSELS (AP) — The prize in this art heist is worth more than its gold. To Romania, the ancient helmet is a priceless cultural heirloom. To the Netherlands, it’s a stolen artifact that authorities hope to retrieve to uphold a reputation for safe museums.

The intricate golden Cotofenesti helmet dates back some 2,500 years and is one Romania’s most revered national treasures from the Dacia civilization. It was on display at the small Drents Museum in eastern Netherlands on the last weekend of a 6-month stint when thieves nabbed it.

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