The Benedictine Convent of St John the Baptist — in Romansh, Claustra Son Jon — stands at Müstair, in the Val Müstair of the Swiss canton of Grisons, close to the Italian border. A remarkably well-preserved monastery of the Carolingian era, it was inscribed on the UNESCO World Heritage List in 1983.
At the heart of the complex is the convent church, built from about 775 as a simple hall church with three apses and a flat wooden ceiling. Its walls were covered with magnificent fresco cycles, and both the building and its paintings count among the most important surviving testimonies of the Carolingian Renaissance. Over the centuries the frescoes were whitewashed and forgotten; they were rediscovered in 1947 and uncovered by 1951.
