Peter Thumb was an Austrian architect and master builder whose family came from Bezau, Vorarlberg, in the westernmost part of Austria. He was active in Baden, the Black Forest, Alsace, Upper Swabia, on and around Lake Constance, and in Switzerland. He is best known for his Rococo architecture, mainly in Southern Germany. Outstanding examples of his work include the pilgrimage church at Birnau on Lake Constance and the monastery library at the Abbey of Saint Gall, Saint Gallen, Switzerland.

The Abbey of Saint Gall is a dissolved abbey (747–1805) in a Catholic religious complex in the city of St. Gallen in Switzerland. The Carolingian-era monastery existed from 719, founded by Saint Othmar on the spot where Saint Gall had erected his hermitage. It became an independent principality between 9th and 13th centuries, and was for many centuries one of the chief Benedictine abbeys in Europe. The library of the Abbey is one of the oldest monastic libraries in the world.