You do realize where that image resides, yes?

Unless you speak German, research what the words above the crypt mean in English...it will make the image and the instruments bunched before the skulls make more sense....and I am sure you will discover where this image is replicated from in your research. (Although inside the building it is not a painting or a woodcut....there actually are four skulls gathered in this fashion with the tools and instruments in front of them, with the engraving above the stone slab crypt...)