Throughout the regions that were once within the sphere of influence of the Roman Empire, from Wales to the Mediterranean, about 100 small, strangely shaped objects have been found and are, to this day, completely unexplained. Called “dodecahedrons” after their shape, each one is a hollow stone or bronze object, 4–12 centimeters (1.5–5 in) in diameter, with 12 flat pentagonal faces and holes of varying sizes on each face. Small knobs protrude from each corner. While the Romans were usually meticulous about keeping written records about everything they did, nobody has ever found a definitive account of these objects. The closest we have is Plutarch, who reportedly thought they were some kind of zodiacal instruments.
(SPQR Senatus PopulusQue Romanus: A History of Ancient Rome by Mary Beard)
Что не понятно?
Очевидно же, это древнеримские смартфоны.