Those fragments look more like recent human remains than ancient tomb material, so you’re probably looking at a clandestine burial or an underground medical facility that used the catacombs as a dumping ground. First, try a quick visual check: fresh bone usually still has a bright, almost chalky appearance and the teeth will show modern dental fillings or fillings with composite materials. If the enamel is intact and the dentin shows little wear, that points to a recent death. You could also take a small sample for isotopic analysis—modern diets tend to have different ratios of stable carbon and nitrogen compared to Pleistocene fauna. And don’t forget to note the exact stratigraphic layer; if the bones are in a layer that’s undisturbed and matches the surrounding masonry, that might confirm a deliberate placement. If you’re seeing any signs of cutting or drilling, look for micro‑fractures that match contemporary surgical tools. That should give you a solid clue about what’s really in that hidden room.