Tuscany is arguably one of the most important wine-producing regions in Italy, where it is known locally as Toscana. A full 68% of the region is classified as 'hilly' and hillside vineyards produce the overwhelming majority of the highest quality wines. Sangiovese, the region's signature grape variety, seems to thrive on the concentration of sunlight that these slopes provide. Growers also value the diurnal temperature variation as an important factor in creating aromatic qualities.From Carmignano in the north, to Chianti and Brunello further south, Sangiovese is synonomous with quality wines of the region. White wines are also produced in more than a dozen DOCs, mainly from the local Trebbiano grape.