"The Convent of Müstair, which stands in a valley in the Grisons, is a good example of Christian monastic renovation during the Carolingian period. It has Switzerland's greatest series of figurative murals, painted c. A.D. 800, along with Romanesque frescoes and stuccoes."
Source: UNESCO World Heritage
A multi-view of Mustair with the Convent of Mustair in the top right corner. Thanks to Beckers of Belgium.