Although there are a number of stories about its name, it's generally held that Italy's 'holy wine', vin santo (or vinsanto) was initially used in the Church's Holy Communion. It's a classic passito, usually made of white grapes, such as Trebbiano and Malvasia, which are left to dry (traditionally on straw) until December, before being pressed and sealed in oak, chestnut or other wooden barrels for four to ten years, with no topping up as the 'angels' share' evaporates, leading to the slight oxidation characterized by the wine's amber colour.
Others (in the Marche) say the name comes from leaving the raisins to dry until Holy Week. Often families will make a cask of vin santo when a baby is born and save it to drink at their wedding.
Sometimes red Sangiovese grapes are used, producing a rosé vin santo called Occhio di Pernice or eye of the partridge (not to be confused with the pasta shape).
Image by McPig