Roman dodecahedron – £33,000 at Wilkinson’s.
Roman dodecahedra – handheld bronze or copper alloy objects cast with 12 flat pentagonal faces and ball finials to the 20 vertices –continue to baffle after more than two-and-a-half centuries of study.
Since one was found as part of a coin hoard in England and discussed by the Society of Antiquaries in 1739, more than 100 others have been unearthed at sites across northern Europe. Archaeological context dates them to the 1st to 5th centuries