This is a stone sarcophagus, intended for use in tabletop miniature games. Or just any time you need a sarcophagus.
I made the coffin myself, and the statue is Our Lady Star Of The Sea Angel 1 - ReCap'd by tbuser.
The floor and walls shown in the picture are not included in the object file. And indeed, that is a very small print, intended for tabletop RPG miniatures.
I made the coffin in OpenSCAD, then opened that in Blender and combined it with the statue, using a Boolean Union and a Remesh operation. Remarkably straightforward!