# Sparavigna 2012: Roman Dodecahedron as dioptron: analysis of freely available data

> Amelia Carolina Sparavigna, 2012. 5 records on Mysteries Department cite it. The rangefinder answer and the one analysis of hole sizes that is openly…

Source: https://mysteriesdept.com/sources/SRC0D5Y5MRA6QF4/roman-dodecahedron-as-dioptron-analysis-of-freely-available  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

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[Sources](https://mysteriesdept.com/sources)[Gallo-Roman dodecahedra](https://mysteriesdept.com/mysteries/roman-dodecahedra)Sparavigna 2012

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# Roman Dodecahedron as dioptron: analysis of freely available data

Amelia Carolina Sparavigna, 2012. _arXiv 1206.0946_.

Argues from published dimensions that the dodecahedron was a coincidence rangefinder (dioptron) and gives the optical equation.

**Gallo-Roman dodecahedra** PreprintChecked against the original0

## What it's used for here

The rangefinder answer and the one analysis of hole sizes that is openly available.

## Cited by on this site 5 records

[Hole diameters on different examples follow shared ratios or units.](https://mysteriesdept.com/mysteries/roman-dodecahedra/answers/ANS0D5Y5Z8812GQ/hole-diameters-on-different-examples-follow-shared-ratios-or)

Answer

ANS

[They were measuring instruments, such as rangefinders, surveying aids or devices for fixing the sowing date…](https://mysteriesdept.com/mysteries/roman-dodecahedra/answers/ANS0D5Y5VB85TN2/they-were-measuring-instruments-such-as-rangefinders)

Answer

ANS

[The geometry of opposed holes of different size can work as a coincidence rangefinder.](https://mysteriesdept.com/mysteries/roman-dodecahedra/evidence/EVD0D5Y5VK218RM/the-geometry-of-opposed-holes-of-different-size-can-work-as)

Evidence

EVD

[The Gallo-Roman dodecahedra](https://mysteriesdept.com/mysteries/roman-dodecahedra)

The mystery article

MYS

[Do the hole-diameter sets follow a common system?](https://mysteriesdept.com/mysteries/roman-dodecahedra/questions/QST0D5Y5TVM4YJ0/do-the-hole-diameter-sets-follow-a-common-system)

Question

QST

## Cite it

```
Sparavigna, A. C. (2012). Roman Dodecahedron as dioptron: analysis of freely available data. arXiv 1206.0946. https://arxiv.org/abs/1206.0946
```

[Read it free at arxiv.org](https://arxiv.org/abs/1206.0946)

Key

**SRC** 0D5Y5MRA6QF4

Kind

Preprint

Rights

arXiv-nonexclusive

Kept

27 Oct 2026, for editors

Checked

Against the published original

Added by

[apollo](https://mysteriesdept.com/u/apollo)

The record

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[CSL-JSON](https://mysteriesdept.com/sources/SRC0D5Y5MRA6QF4/roman-dodecahedron-as-dioptron-analysis-of-freely-available/csl.json)