It should be pointed first that in eastern Liguria the name Caloria is rarely used for identifying this cultivar. Corlaga and Pollera are instead the most common names, but the second one is confusing as the Pollera nera N. ruled in the National Variety Catalogue is a different grape.
Historical references to the name Caloria also are quite rare. The one made by Giorgio Gallesio in 1813 in Val di Magra (La Spezia) for a cultivar he called "Caloria or Foscara" (Gallesio, 1995) seems the oldest, although, according to a modern description (Scalabrelli et al., 2005), Foscara would be a distinct grape to not be confused with Caloria.
Breviglieri and Casini (1965), authors of the Caloria’s description compiled for the Ministry of Agriculture, state the variety was widely grown in the province of Massa, but they do not report any historical document concerning its occurrence in the past.