Cles (German: Glöß; Nones: Clés or Cliès) is a town and comune in Trentino, in the Trentino-Alto Adige/Südtirol region of northern Italy.

The lake can contain up to about 180 million cubic metres water, which feeds the turbines of the hydroelectric plant in Taio.

The Tabula clesiana is a bronze plate measuring 49.9 by 37.8 by 0.61 centimetres (19.65 by 14.88 by 0.24 in) that was discovered in 1869 at Campi Neri in Cles.

It contains the edict of the Emperor Claudius of 46 AD, which granted Roman citizenship to the Alpine peoples of the Anauni, Sinduni and Tulliasses.

The Tabula is an important evidence of the rapid assimilation by the Roman world of the Alpine peoples of farmers-hunters; but also from the point of view of the Roman law the first evidence of the introduction of delatores in the fiscal controversy.