Giotto, Madonna and Child, c. 1310/1315, tempera on poplar panel, National Gallery of Art, Washington. https://dartabase.art/cite/nga/397

Grifo di Tancredi, Saint Peter, c. 1310, tempera on panel, National Gallery of Art, Washington. https://dartabase.art/cite/nga/34

Grifo di Tancredi, Christ Blessing, c. 1310, tempera on panel, National Gallery of Art, Washington. https://dartabase.art/cite/nga/33