Made this Roman dodecahedron for my collection of peculiar objects. It follows dimensions from this paper: Une fouille en bordure des thermes de Jublains (Mayenne) : enfin un dodécaèdre en contexte archéologique !

From wikipedia:

A Roman dodecahedron or Gallo-Roman dodecahedron is a small hollow object made of copper alloy which has been cast into a regular dodecahedral shape: twelve flat pentagonal faces, each face having a circular hole of varying diameter in the middle, the holes connecting to the hollow center. Roman dodecahedra date from the 2nd to 4th centuries AD and their purpose remains unknown. They rarely show signs of wear, and do not have any inscribed numbers or letters)

Printed using Galaxy Black Prusament PLA. Layer height 0.2mm, with painted tree supports. I attached pegs (rounded bolts) not permanently with B7000 glue, but any other glue suitable for printed plastic will be ok. 
Clean peg holes with 2mm drill bit if necessary.