Coppo di Marcovaldo (Coppo di Marcovaldo; approx. 1225, Florence - approx. 1275, Siena).
In 1260 he took part in the Battle of Montaperti on the side of the Florentine supporters of the pope - Guelph. In the battle of the Florentines were defeated by the Sienese Ghibellines, and Coppo di Siena Marcovaldo got into captivity. The second documented product Coppo di Marcovaldo is painted a cross, which in 1274 he created together with his son, Salerno di Coppo, to the cathedral in Pistoia. Some critics believe that the cross was made by his son.
Coppo di Marcovaldo attributed to the altar the image of Archangel Michael and the scene of his legend, which is now considered the earliest of his works (1250-60gg., San Casciano Val di Pesa, Museum of Religious Art), another painted cross (after 1261, San Gimignano, Pinacoteca), and the altar the image of the St. Master of San Francesco Bardi (Florence, p. Santa Croce, Cappella Bardi).
http://ru.wikipedia.org/wiki/%D0%9A%...8C%D0%B4%D0%BE
Here is also a mosaic attributed to him from the Florentine Baptistery.
Having made more human traits and plasticity in the Byzantine tradition, he, along with Guido da Siena is one of the founders of the Sienese school.