The Ancient Roman Dodecahedron: The Mysterious Object That Has Baffled Archaeologists for Centuries

There isn’t much place for dodec­a­he­dra in mod­ern life, at least in those mod­ern lives with  table­top role-play­ing. In the ancient Roman Empire, how­ev­er, those shapes seem to have been prac­ti­cal­ly house­hold objects — not that we know what the house­hold would have done with them. Thus far, well over 100 sim­i­lar­ly designed cop­per-alloy sec­ond-to-fourth-cen­tu­ry arti­facts labeled “Roman dodec­a­he­dra” have been dis­cov­ered: the first was unearthed in 1739, and the most recent just two years ago. With their com­plex struc­ture, knobbed cor­ners, and (in some cas­es) sur­face designs, their con­struc­tion would have required a skilled met­al­work­er. Per­haps they were the result of pro­fes­sion­al exam­i­na­tion, premised on the idea that a man who can make a prop­er dodec­a­he­dron can make any­thing.

That’s one the­o­ry, if only one of many. In the video above, Joe Scott goes over a vari­ety of them, explain­ing why ama­teurs and experts alike have pro­posed that the Roman dodec­a­he­dron was every­thing from a mil­i­tary rangefind­er to a sun­di­al cal­en­dar to a decoder to a mea­sur­ing device to a coin val­ida­tor to a rit­u­al­is­tic amulet to a “Roman fid­get spin­ner.”

One par­tic­u­lar­ly com­pelling expla­na­tion holds that it was an aid for a chain-mak­ing tech­nique called “Viking knit­ting,” which would at least make sense giv­en that all extant exam­ples have come from north­ern Europe. Yes, no Roman dodec­a­he­dron has ever been found in Rome, or even in the whole of Italy, and that’s far from the most con­fus­ing fact about these still-mys­te­ri­ous objects.

The propo­si­tion that the Roman dodec­a­he­dron was a knit­ting aid, espe­cial­ly if it was used for mak­ing chain, is under­cut by the lack of wear on all known exam­ples. Mil­i­tary or tech­ni­cal appli­ca­tions are also made some­what implau­si­ble by the absence of numer­als or oth­er mark­ings. While some Roman dodec­a­he­dra have been dug up from army camps, many more came from the tombs of upper-class women, sug­gest­ing that they had more val­ue as a sta­tus sym­bol than a prac­ti­cal tool. Most bewil­der­ing of all is the fact that no texts or images from the peri­od make any ref­er­ence to the things, which Scott takes as evi­dence for their being so com­mon as not to mer­it dis­cus­sion — much like, say, the ice­box doors or tele­phone shelves built into nine­teenth and ear­ly twen­ti­eth-cen­tu­ry hous­es. At this point, can we real­ly rule out the notion that the Romans made them as a prank on the far-future inher­i­tors of their civ­i­liza­tion?

Relat­ed Con­tent:

Archae­ol­o­gists Dis­cov­er a 2,000-Year-Old Roman Glass Bowl in Per­fect Con­di­tion

How the Ancient Greeks Invent­ed the First Com­put­er: An Intro­duc­tion to the Antikythera Mech­a­nism (Cir­ca 87 BC)

Dis­cov­er the “Brazen Bull,” the Ancient Greek Tor­ture Machine That Dou­bled as a Musi­cal Instru­ment

The “Dark Relics” of Chris­tian­i­ty: Pre­served Skulls, Blood & Oth­er Grim Arti­facts

Explore a Dig­i­tized Edi­tion of the Voyn­ich Man­u­script, “the World’s Most Mys­te­ri­ous Book”

Based in Seoul, Col­in Marshall writes and broad­casts on cities, lan­guage, and cul­ture. His projects include the Sub­stack newslet­ter Books on Cities and the book The State­less City: a Walk through 21st-Cen­tu­ry Los Ange­les. Fol­low him on the social net­work for­mer­ly known as Twit­ter at @colinmarshall.

 


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Comments (5)
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  • Terry Smith says:

    I think that they are for hold­ing flower arrange­ments, per­son­al­ly.

  • David Carberry says:

    Could it be a sort of hitch?

    You can run leather laces through the holes and attach them to the nodes with­out hav­ing to tie two leather laces togeth­er. It would be easy way to con­nect and dicon­nect.

    Just my opin­ion man.

  • Sal says:

    I watched a video on micro­scop­ic water mol­e­cules under elec­tron micro­scope and they appear to have the same shape and design as the roman arti­facts.

  • Clayton Evans says:

    They were used for games Romans played

  • Blair Campbell says:

    The knobs at the cor­ners are plain­ly indis­pens­able to their intend­ed use, or they would have been dis­pensed with in the major­i­ty of instances uncov­ered. That is one con­sid­er­a­tion. A sec­ond is that although no wear is report­ed on the ones exca­vat­ed to sug­gest their pos­si­ble use, I think this is erro­neous. Most have con­cen­tric cir­cles around some or all holes. This sug­gests some­thing was turned while insert­ed into the hole, and done so fre­quent­ly enough to result in these pat­terns. Per­haps the dis­cov­er­ers sim­ply regard these pat­terns as inci­den­tal to bor­ing the holes, but the pat­terns are not always there, and have wide-rang­ing degrees of promi­nence. Also, Latin lit­er­a­ture should be scoured for ques­tion­ably trans­lat­ed tools the name of which may fit what is now called a dodec­a­he­dron. We have no idea what term may have been used oth­er than the orbis spo­ken of in this one instance.

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