The vineyards of the Austrian province belong (along with Carinthia, Salzburg, Tyrol and Vorarlberg) to the smallest wine-growing region, Bergland. This designation applies to Land wines; the quality wines may be marketed under "Weinbaugebiet Oberösterreich". Upper Austria is best known for its cider, also known as "Landessäure". Viticulture has been a tradition here since the Celts and Romans. From the 14th to the 16th century there was a heyday. Climatic changes associated with the Little Ice Age caused a decline and therefore a boom in the production of beer.