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
Madeira wine Wine. The rest of the 20th century saw a downturn for Madeira, both in sales and reputation, as low quality "cooking wine" became primarily associated with the island—much as it had for Marsala. In 1988, the Symington family of Portugal invested in the Madeira Wine Company which owned many of the Madeira brand names. They asked Bartholomew Broadbent to re-launch Madeira and create a market for it again in America, which he did in 1989, establishing a firm rebirth of Madeira. Towards the end of 20th century, some producers started a renewed focus on quality—ripping out the hybrid and American