Duccio di Buoninsegna
Duccio's most significant commission for the city of Siena was the monumental picture of the Madonna for the cathedral’s high altar, The Maestà.
Today nine or ten works definitely by Duccio’s hand are known. They are: the Crevoli Madonna (1280), the Madonna of the Franciscans (1300), Madonna in the Galleria Nazionale of Perugia, the Maestà (1308-1311), the Rucellai Madonna (1285), a Madonna in a private collection in Brussels, two altarpieces in the Pinacoteca Nazionale of Siena, The Holy Virgin with the Christ Child and Four Saints (1300); and two triptychs, one in the National Gallery in London, The Holy Virgin and the Christ Child with St. Dominic and St. Aurea (1300), and one in the Museum of Fine Arts in Boston. 
At the Metropolitan Museum of Art is exhibited Madonna and Child.
Duccio worked mostly with pigment and egg tempera.