«Or levando l'ombre, or tergendo le tele e qualvolta anco aggiungendo colori». Appunti sui frammenti del ciclo micaelico di Ambrogio Lorenzetti a Montesiepi

The subject of the frescos, by now fragmented, carried out by Ambrogio Lorenzetti for the side walls of the so called Saint Galgano Chapel in Montesiepi, has never (or partially) been identified up to now. Based on literary sources, this paper shall analyze the iconographic content of the remaining paintings and shall prove the subject of the frescos was not Saint Galgano, but instead Saint Michael the Archangel, another important saint universally worshipped, whose iconography is pretty much widespread also in 14th century Tuscany.