Roman dodecahedron

A Roman dodecahedron or Gallo-Roman dodecahedron is a type of small hollow object made of copper alloy that has been cast into a regular dodecahedral shape with twelve flat pentagonal faces. Each face has a circular hole of varying diameter in the middle, the holes connecting to the hollow center, and each corner has a protruding knob. They rarely show signs of wear and do not have any inscribed numbers or letters.

Since the first known example was recorded in 1739, over one hundred such objects have been discovered, dating from the 2nd to 4th centuries AD. Their purpose or meaning has been long debated but remains unknown.

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