The Madonna depicted , seen at a very narrow angle in the centre of the painting , is actually not by Cimabue .
Instead it is the Rucellai Madonna by Sienese artist Duccio di Buoninsegna .
The Madonna depicted , seen at a very narrow angle in the centre of the painting , is actually not by Cimabue , but instead it is the Rucellai Madonna by Sienese artist Duccio di Buoninsegna .