Marche is a region on the eastern side of central Italy. The influences of the Apennines, the Adriatic and the region's rivers results in there being a range of climates at work in Marche, giving wine producers both warm and cool viticultural zones to use. Calcareous, clay and limestone-rich soils contribute to a distinctive terroir, and also vary according to the region's distinctive topography. Marche is best known as a white-wine region, although it is home to some reds of very high quality too. Among the red wines of Marche, the finest are generally made from Montepulciano and/or Sangiovese, the dark-skinned varieties that dominate central Italian red. In terms of volume, the leading white varieties here are the Trebbiano and Verdicchio, the grape to which Marches has been a spiritual home for more than 600 years. Some of the finest expressions of Verdicchio are found in the DOCGs Verdicchio dei Castelli di Jesi.