white wine is being made in the dry style again. Much of the wine sold in Germany is dry, especially in restaurants. However most exports are still of sweet wines, particularly to the traditional export markets such as the United States, the Netherlands and Great Britain, which are the leading export markets both in terms of volume and value. Red wine has always been hard to produce in the German climate, and in the past was usually light-colored, closer to rosé or the red wines of Alsace. However recently there has been greatly increased demand and darker, richer red wines (often barrique-aged) are produced from grapes such as Dornfelder and Spätburgunder, the German name for Pinot noir. Perhaps the most distinctive characteristic of German wines is the high level of acidity in them, caused both by the lesser ripeness in a northerly climate and by the selection of grapes such as Riesling, which retain acidity even at high ripeness levels. History Early history Viticulture in present-day Germany dates back to Ancient Roman times, to sometime from 70 to 270 CE/AD (Agri Decumates). In those days, the western parts of today's Germany made up the outpost of the Roman empire against the Germanic tribes on the other side of Rhine. What is generally considered Germany's oldest city, Trier, was founded as a Roman garrison and is situated directly on the river Moselle (Mosel) in the eponymous wine region. The oldest archeological finds that may indicate early German viticulture are curved pruning knives found in the vicinity of Roman garrisons, dating from the 1st century AD. However, it is not absolutely certain that these knives were used for viticultural purposes. Emperor Probus, whose reign can be dated two centuries later than these knives, is generally considered the founder of German viticulture, but for solid documentation of winemaking on German soil, we must go to around 370 AD, when Ausonius of Bordeaux wrote Mosella, where he in enthusiastic terms described the steep vineyards on the river Moselle. The wild vine, the forerunner of the cultivated Vitis vinifera is known to have grown on upper Rhine back to historic time, and it is possible (but not documented) that Roman-era German viticulture was started using local varieties. Many viticultural practices were however taken from other parts of the Roman empire, as evidenced by Roman-style trellising systems surviving into the 18th century in some parts of