Guido of Siena, was an Italian painter, active during the 13th-century in Siena, and painting in a Byzantine style. The name Guido is known from the large panel in the church of San Domenico, Siena of the Virgin and Child Enthroned. The rhymed Latin inscription gives the painter's name as Guido de Senis, with the date 1221. However, this date canno...
Wikipedia link: Click Here