In 1845 workers in an ex-convent uncovered an extraordinary site – a huge, intact fresco of the Last Supper in a former cenacolo (monk’s refectory). At first attributed to Raphael, it is now generally believed to be the work of Perugino, though completed largely by his students. The dining apostles are set against a sylvan country scene, creating the effect that you’re looking through a window onto the harmonious scene.