A rare representation of the goddess Roma on ancient gold glass has emerged during construction works for Rome's third subway line, the city has announced. Originally the base of a drinking glass, the discovery features an image of the female deity - the personification of the city of Rome - wearing a helmet and carrying a spear.

It is the first time that any representation of Roma in gold glass has ever been found, according to archaeologist Simona Morretta of Rome's special superintendency. Describing it as "extraordinarily refined", Morretta told news agency ANSA: "Golden glass is already a very rare find, but this has no comparison". Gold glass is a luxury form of glass where a decorative design in gold leaf is fused between two layers of glass.