A mysterious Roman object unearthed in an amateur dig has baffled experts as it goes on display in Britain for the first time.

The 12-sided object was discovered in Norton Disney, near Lincoln, in 2023, and will go on display at Lincoln Museum as part of the city’s Festival of History.

Richard Parker, secretary of the Norton Disney History and Archaeology Group, said it was a “privilege to have handled” the dodecahedron, but was still at a loss over what it was.