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 is produced in a variety of styles, ranging from dry, light versions such as finos to much darker and sometimes sweeter versions known as olorosos. Cream sherry is always sweet. Vermouth is a fortified wine flavoured with aromatic herbs and spices ("aromatised" in the trade) using closely guarded recipes (trade secrets). Some of the herbs and spices used may include cardamom, cinnamon, marjoram and chamomile. Some vermouth is sweetened; however, unsweetened or dry, vermouth tends to be bitter. The person credited with the second vermouth recipe, Antonio Benedetto Carpano from Turin, Italy, chose to name his concoction "vermouth" in 1786