Hungary has a very old winegrowing culture, because wines from Sopron and Eger were already known in the 13th century. The Greeks introduced viticulture in Hungary from the south-east along the Danube and its tributary the Tisza upwards and the Romans from the west across the Pannonian plain to Lake Balaton. Despite Hun, Vandal, Goths, Tatars and Ottoman invasions over many centuries, wine was always grown in this area. Even the Ottomans, who occupied the largest part of the country for about 160 years, did not suppress wine growing despite the ban on alcohol and were happy to collect taxes for it, but development was inhibited during this time. According to a rather legendary tradition, Emperor Charlemagne (742-814) was so enthusiastic about "Avar wine" that he had some vines brought to Germany.