The Nativity with the Prophets Isaiah and Ezekiel by Duccio di Buoninsegna https://www.nga.gov/artworks/10-nativity-prophets-isaiah-and-ezekiel
This panel is one of two owned by the National Gallery of Art from one of the most important monuments of Western painting: the towering, two-sided altarpiece known as the Maestà by Duccio di Buoninsegna .
ndiger beschreibender Katalog mit Abbildungen sämtlicher Gemälde, vol. 1, die romanischen