Archaeological evidence suggests that grapevines have been grown and cultivated in what is today modern Austria for over four thousand years, making it one of the oldest wine producing countries in the world. Over the centuries, relatively little has changed in Austrian wine, with the dominant grape varietals continuing to be Grüner Veltliner, Zweigelt, Pinot Noir and others. Austria is renowned for producing excellent and characterful dry white wines, although in the eastern part of the country, many wineries specialist in sweeter white wines made in a similar style to those of neighboring Hungary. Today, Austria has over fifty thousand hectares under vine, split over four key wine regions. The domestic wine industry remains strong, with Austrians drinking their local produce outside in the summer, and people around the world are beginning to once more rediscover this fascinating and ancient wine culture. The sparkling wines of Champagne have been revered by wine drinkers for hundreds of years, and even today they maintain their reputation for excellence of flavor and character, and are consistently associated with quality, decadence, and a cause for celebration. Their unique characteristics are partly due to the careful blending of a small number of selected grape varietals, most commonly Chardonnay and Pinot Noir. These grapes, blended in fairly equal quantities, give the wines of Champagne their wonderful flavors and aromas, with the Pinot Noir offering length and backbone, and the Chardonnay varietal giving its acidity and dry, biscuity nature. It isn't unusual to sometimes see Champagne labeled as 'blanc de blanc', meaning it is made using only Chardonnay varietal grapes, or 'blanc de noir', which is made solely with Pinot Noir.