A diamond necklace, part of a luxury jewelry exhibition in Vienna showcasing pieces from a Parisian jeweler, has been stolen. The necklace, once owned by a queen, featured over 200 carats of diamonds and was valued at several million euros. The exhibition displayed items from a renowned Parisian luxury jeweler and attracted considerable attention. Authorities believe the theft was carried out with relative ease, indicating potential security flaws. The stolen piece was a particularly dazzling item – a diamond collier with 673 diamonds. An investigation is now underway to recover the necklace and apprehend the perpetrators. The theft highlights the risks associated with exhibiting high-value items.