Catholic Encyclopedia: Duccio di Buoninsegna: Artist's biography.
CGFA: Duccio di Buoninsegna: Image gallery and artist's biography from MS Encarta '97.
Christus Rex: Duccio di Buoninsegna: A virtual gallery of the artist's most famous paintings.
Duccio and the Art of Siena: Article about the artist's art and a comparison of his works with Giotto's.
Duccio di Buoninsegna: Artist's image gallery.
Olga's Gallery: Duccio di Buoninsegna: Comprehensive collection of images with artist's biography and historical comments.
The Columbia Encyclopedia: Duccio di Buoninsegna: Artist's biography.
The Frick Collection: Duccio: Temptation of Christ on the Mountain: Story about the artist's masterpiece.
The Life of Duccio by Vasari: Excerpts from the biography of the artist by famous Giorgio Vasari.
Web Gallery of Art: Duccio di Buoninsegna: Collection of images and artist's biography.