Weingut Stift Klosterneuburg is the winemaking operation of the historic Augustinian Monastery in the town of Klosterneuburg, located in the north-western suburbs of Vienna. At nearly 900-years old, it is one of the oldest and most well-respected wine producers in Austria. The monastery is traditionally associated with viticulture , scholarship, and art, and has an extensive library, enormous wine cellars, and the famous Verduner Altar (1181) by Nicholaus of Verdun. Today, the Monastery owns vineyards in Klosterneuburg itself, and also in Vienna, both growing predominantly white grapes, and at Tattendorf in Thermenregion, where grapes for red wines are grown. Of particular interest are the excellent value white varietals, and fine Sekt.  The town of Klosterneuburg is also home to the Federal College of Viticulture, one of the only schools in the world with a focus on wine-making, and the viticultural research station responsible for, amongst other things, the creation of the Zweigelt red grape variety in 1922.