Stock Photo: Blessed Agostino Novello Altarpiece, by Martini Simone, 1325 - 1328, 14th Century, tempera on panel. Italy, Tuscany, Siena, National Gallery of Art. Detail. The miracle of the knight falling down a ravine the knight: horseman in prayer and the horse fell flat on his back (right compartment, the upper order: tier). Brown hues: shades black brown pink.