Irpinia has played such an important role in Campanian wine production that the rail line linking Avellino and Rocchetta Sant'Antonio was known as "the Wine Line". Completely planted in vines, the province of Avellino features products of international reputation, such as Greco di Tufo, Taurasi and Fiano. The Fiano di Avellino takes its name from the variety that the Latins called Vitis Apiana. That was because the vine's grapes were so sweet that they proved irresistible to bees ("api"). The wine, which was already highly appreciated in the Middle Ages, originated several millennia ago. An order for three "salme" (a measure) of Fiano is entered in the register of Holy Roman Emperor Frederick II. And Charles d'Anjou must have enjoyed the wine, since he had 16,000 Fiano vines planted in the royal vineyards. The grapes' sugar content is so high that a virtually sweet sparkling wine is made in the area that has many local admirers, although it has not been possible to market it nationally and internationally. Years of experiment have enabled winemakers to produce a dry Fiano, a wine of great elegance and refinement with an intense odour and a harmonious flavour that features scents of toasted hazelnuts. Perfect as an aperitif, the wine also makes a fine accompaniment for refined dishes based on seafood.