The painting is attributed to the great Sienese artist Ambrogio Lorenzetti (known from 1319 to 1348).
The panel, recently restored, is now separated from the rich carpentry encarved with "ancient style" motifs by Fra' Raffaele da Brescia in which it was re-assembled in the early 16th century; probably in that period it was also settled from its original setting to the Rofeno church. The impressive image of St. Michael the Archangel, rendered in dynamic action elegant, struggling with the dragon described in the Apocalypse, is emphasized by the fluttering of the fine bi-coloured mantle and almost enclosed in the embrace of its broad wings. The articulation of the scene, playing in a curvilinear and enveloping rhythms, is exalted by rich, elegant colours. The masterpiece, quoted also by Vasari, was considered as a model for many successive painters.