Vin Santo
Vin Santo is a style of Italian dessert wine. Traditional in Tuscany, these wines are often made from white grape varieties such as Trebbiano and Malvasia, although Sangiovese may be used to produce a rosé style known as "Occhio di Pernice" or eye of the partridge. The wines may also be described as straw wines since they are often produced by drying the freshly harvested grapes on straw mats in a warm and well ventilated area of the house (however, several producers dry the grapes by hanging on racks indoors). Although technically a dessert wine, a Vin Santo can vary in sweetness levels from bone dry (like a Fino Sherry) to extremely sweet. While the style is believed to have originated in Tuscany, examples of Vin Santo can be found throughout Italy and it is an authorised style of wine for several denominazione di origine controllata (DOC) and indicazione geografica tipica (IGT). Although the style of making wine from dried grapes has been around almost as long as wine has been made, there are many theories on how the particular name Vin Santo or "holy wine" came to be associated with this style of wine in Italy. The most probably origin was the wine's historic use in the Catholic Mass, where sweet wine was often preferred. One of the earliest references to a vinsanto wine comes from the Renaissance era sales logs of Florentine wine merchants who widely marketed the strong, sweet wine in Rome and elsewhere. Eventually the term vinsanto became almost an umbrella name for this style of wine produced elsewhere in Italy. When the Greek island of Santorini came under rule of the Ottoman Empire, the ruling Turks encouraged the island's wine production of a sweet dessert wine made from dried grapes. Over the next few centuries, this wine became known as Vin Santo and was widely exported to Russia, where it was used in the Eucharist by the Russian Orthodox Church.
Source: Wikipedia