The Fresco of Guidoriccio da Fogliano

Detail from Simone Martini's fresco of Guidoriccio da Fogliano at the Siege of Monte Massi in 1328 at Scala/Palazzo Pubblico, Sienna. (I don't know exactly when the picture was painted, but Martini's dates are 1284-1344, so it must have been pretty soon after the 1328 siege.)

Thanks to Bob Charrette, who found this picture.