It also has great cultural treasures, many of them in mountain cities such as Orvieto, Perugia and Assisi. It is possible to admire the magnificent reliefs and mosaics of the façade of the medieval cathedral of Orvieto, see the amazing frescoes by Giotto in the basilica of St. Francis of Assisi (first glimpses of Renaissance art) and explore the National Gallery of Umbria in Perugia, with works of the thirteenth century.