 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.Thirty 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 on floor plans similar to that of its mother house, St. Alban's Abbey, Mainz.