Brief synthesisThe Benedictine Convent of St John at Müstair, located in a valley of the Grisons in the extreme south-eastern part of Switzerland, south of the Alps, was founded around 775, probably on the orders of Charlemagne. Today, the convent ensemble comprises the Carolingian conventual church and the Saint Cross Church, the residential tower of the Abbess von Planta, the ancient residence of the bishop, including two rectangular courtyards. The conventual church houses the most important cycle of frescoes of the Carolingian era conserved in situ. The boundaries of the property are located in a non-constructible zone and guarantee maintenance of the landscape values of the property. The “Pro Kloster Müstair” Foundation that exists since 1968 is responsible for the management and conservation of the property.