The Romans left over a hundred mysterious bronze dodecahedra and not a single word about what they were for. They have been called rangefinders, calendars, candlesticks and even tools for knitting gloves.

200

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The event

• Roman dodecahedrac. 200 · Gaul and Germania. More than a hundred hollow bronze twelve-sided objects, with holes of different sizes and knobs on the corners, have turned up in Rome's north-western provinces. No Roman text mentions them, and the guesses range from surveying tool to knitting aid.

2nd century

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