This work by https://www.swantower.com is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

This is a wall mural of Leonardo da Vinci’s famous painting of The Last Supper. It sits in St. Kinga’s Chapel in the Wieliczka Salt Mine . . . which means that, like pretty much everything there, it’s carved out of rock salt. Which, you have to admit, is pretty impressive!