Simple latching Celtic jewellery box based off https://www.deviantart.com/mossy-tree Celtic box.
The author remixed this model.
I loved the original, but didn't like the idea of having 3 separate boxes. So I modified it to be a single box. Then changed the box so the lid was inset, instead of resting on the top, so it was harder to open without the key. Lastly, created a latching mechanism on the inside, and a shaped key for the centre to open it when pushed in.