Port Wine: A Sweet Delight from Portugal
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Port wine, known simply as port, is a unique red or, more rarely, white sweet wine. It is an oxidative wine and comes exclusively from the Alto Douro region in Portugal. The Port Wine Institute protects the designation “port wine.” Only wines that meet its criteria and come from the precisely defined Douro Valley are allowed to bear this name.
The Roots of Port Wine: Portugal and the Port
The name “port wine” comes from the Portuguese port city of Porto. Traditionally, after production, the wine was shipped from Peso da Régua down the Douro River to Porto. There, it was aged, stored, and distributed internationally. This highlights the wine’s deep connection to its Portuguese homeland and the historic trading port.
A Long History: From the Romans to “Priest Port”
The history of wine in Portugal dates back to the Romans. In the 11th century, Henry of Burgundy had new grape varieties planted. In the 13th century, Vinho de Lamego, a precursor to port wine, emerged in the Douro Valley. The term “Porto” first appeared in customs documents in 1678. Modern port wine originated in the late 17th century. At that time, British merchants were searching for wines in Portugal because relations with France were strained. In a monastery, they discovered “Priest Port.” The secret: fermentation was halted by adding high-proof neutral alcohol. The remaining residual sugar gives port wine its sweetness. This process, known as “fortification,” remains crucial to this day.
How Port Wine Is Made: The Art of Fortification
Port wine is made primarily from grapes grown in the Douro Valley. For red port, varieties such as Touriga Nacional, Tinta Barroca, and Tinta Roriz are key. White port is made from Malvasia Fina, Codega, and Rabigato.
After the harvest, the grapes are pressed. The must begins to ferment. Then comes “fortification”: fermentation is halted by adding approximately 77% wine distillate. The timing of this addition determines the level of sweetness. The final product has an alcohol content of between 19 and 22 percent by volume. This high alcohol and sugar content makes port wine suitable for long-term aging. After vinification, the wine ages for at least two years, often longer, in barrels or bottles, which shapes its character.
Britain’s Love of Port: A Historic Alliance
Port wine’s popularity in the United Kingdom has historical roots. A trade agreement between Portugal and England in 1373 fostered the exchange of wine. The Methuen Treaty of 1703 gave the port wine trade a further boost. Many traditional port houses have British names, underscoring the close connection. Even today, premium port wines remain in high demand in the United Kingdom and North America.
