The Abbey library of St. Galllen (German: "Stiftsbiblothek St.Gallen") is a library in St. Gallen, Switzerland. It was attached to the abbey of St. Gallen. This abbey had a great importance in the Middle Ages. Today, there are about 2 100 manuscripts from the Middle Ages, about 1 650 Inucabula (books and sheets printed before 1501) and early printings before 1520, as well as about 160 000 books. The library is the oldest library in Switzerland. The manuscript B of the Nibelungenlied is kept here.