Port is a fortified, full-bodied sweet red wine made by adding brandy to fermenting wine. The high alcohol content of brandy causes fermentation to stop, killing all yeast activity, and therefore sugar is no longer converted into alcohol. Brandy also raises the final alcohol level of the wine. The result is a sweet wine in perfect balance with the alcohol content, usually in the 18-20% alcohol by volume range with 100 g/L or more of residual sugar. Port, also known as porto, derives its name from the Portuguese city of Oporto, in the Douro Valley, where it originated more than three centuries ago. The Douro Valley Port is produced from a blend of many different dark-skinned grape varieties, up to 20 or more, often harvested from multiple vineyards, each imparting a different characteristic to the final wine. Dark-skinned grapes are used to give port its deep colour. Among these varieties, Touriga Nacional and Tempranillo are the most popular. STYLES of PORT Variou...