 The winery is most noted for its claim to have "discovered" late harvest wine.The castle is a venue of the Rheingau Musik Festival, made available by co-founder Tatiana von Metternich-Winneburg.A mountain on the north bank of the River Rhine near Mainz has been associated with the Church and with winemaking since the Dark Ages, when the estate of Ludwig der Fromme ("Louis the Pious") made 6000 litres of wine during the reign of Charlemagne.