The abbey library of Saint Gall (German: Stiftsbibliothek) is a significant medieval monastic library located in St. Gallen, Switzerland. In 1983, the library, as well as the Abbey of St. Gall, were designated a World Heritage Site, as "an outstanding example of a large Carolingian monastery and was, since the 8th century until its secularisation in 1805, one of the most important cultural centres in Europe". It is one of the oldest monastic libraries in the world.