The items were discovered after the mug’s fake bottom deteriorated over time, with the items now set to be stored in the Collections of the Museum.

Hanna Kubik of the Memorial Collection said they found the ring and necklace wrapped in a piece of canvas.

“During the works to secure the enamelled kitchenware located at the main exhibition, it turned out that one of the mugs has a double bottom,” he explained.

“It was very well hidden, however, due to the passage of time, the materials underwent gradual degradation, and the second bottom separated from the mug.