The “Assisi-Spoleto Olive Belt” is tied to the figure of St. Francis, who turned a tree species of foreign origin into a universal symbol of peace. In the main Franciscan places – from San Damiano, a convent which sprang up around the field oratory where St. Francis began his religious life, to the Hermitage of the Carceri, the saint’s woodland retreat, to Santa Maria degli Angeli, where Francis founded his order and which holds the Porziuncola Chapel and the Transito Chapel, where St. Francis died – it is always possible to find the extremely close tie with the olive tree. The bond is also celebrated in the frescoes by Giotto in Assisi and Benozzo Gozzoli in Montefalco, dedicated to the figure of the saint.
In particular, in the latter’s “Sermon of the Birds” can be seen the “fertile slope” of Mount Subasio, where the farmlands long the slope and covered with arable crops punctuated by large oak trees along borders and in open fields provide the background for the greatness of Francis.