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 Ludwig der Fromme ("Louis the Pious") made 6000 litres of wine during the reign of Charlemagne. In 1100, Benedictine monks completed a monastery on the Bischofsberg ("Bishop's") mountain, having identified the site as one of the best places to grow vines. 30 years later they built a Romanesque basilica in honour of John the Baptist, and the hill became known as Johannisberg (John's mountain). It was constructed according to similar floor plans as its mother house,St. Alban's Abbey, Mainz. As such the monastery was a prime target for the Anabaptists in the Peasants' War of 1525, and it was destroyed.