Here is a 3D printer-friendly version of the 3D scan of the skull recovered from a battle dating back to 1361. Files are presliced and supports added. I used CC3D - Bone White PLA+ (pssst, it's the best bone-colored filament.)

The original model was scanned by the Swedish History Museum (Historiska museet) and published under the Title Cranium with injuries - 260727 on Sketchfab. The file was licensed under a CC-BY license.

The description from Sketchfab:

The Swedish History Museum holds a large collection of bones of various kinds, including human remains. We living humans are both appalled by and attracted to visible evidence of death. The scanned human remains presented on Sketchfab from our museum are important museum artefacts, chosen because they represent a specific historical event. They also represent one of humanity’s worst acts: violence towards other humans. It is therefore our wish that you, as a viewer, use the 3D-models with respect.

The image shows a human cranium with injuries on its left and front side. A small, square hole above the left eye and on the left cheek bone was probably caused by a pole weapon or a battle axe. The gash across the mouth could have been caused by a sword or a thin bladed axe.The cranium is one of several thousand artifacts found in a mass grave outside Visby on the island Gotland. All remains and objects found on the site stem from a battle between Gotlandic peasants and Danish mercenaries on 27 July 1361.