 But to identify and define, among the relics of his age and school, precisely what that work is, and to distinguish it from the similar work of other men whom his influence inspired, is a very difficult matter.Though there are no longer any supporters of the "Pan Giorgionismus" which a century ago claimed for Giorgione nearly every painting of the time that at all resembles his manner, there are still, as then, exclusive critics who reduce to half a dozen the list of extant pictures which they will admit to be actually by this painter.For his home town of Castelfranco, Giorgione painted the "Castelfranco Madonna", an altarpiece in sacra conversazione form—Madonna enthroned, with saints on either side forming an equilateral triangle.