Solera by the producers of sherry. In a Spanish sherry "solera", the vintner may transfer about a third of each barrel a year. A solera sherry has to be at least three years old when bottled. A quite similar process is called sostrera, used to produce fortified wines in the Mediterranean regions of France. In Sicily, where Marsala wine is made, the system is called "in perpetuum". Solera vinification is used in the making of Mavrodafni ("Black Laurel"), a fortified red dessert wine made in the Northern Peloponnese in Greece. Exceptional "Mavrodafni" vintages are released every 20 or 30 years: they
Fortified wine the island's port, Marsala. The fortified version is blended with brandy to make two styles, the younger, slightly weaker "Fine", which is at least 17% abv and aged at least four months; and the "Superiore", which is at least 18%, and aged at least two years. The unfortified Marsala wine is aged in wooden casks for five years or more and reaches a strength of 18% by evaporation. Mistelle (; ; Spanish, Portuguese, Galician and , from Latin / "mix") is sometimes used as an ingredient in fortified wines, particularly Vermouth, Marsala and Sherry, though it is used mainly as