Italian Paintings of the Thirteenth and Fourteenth Centuries: Saint Bernard and Saint Catherine of Alexandria with the Virgin of the Annunciation [right panel], shortly before 1387 | National Gallery of Art https://www.nga.gov/research/publications/italian-paintings-thirteenth-and-fourteenth-centuries-0/italian-paintings-thirteenth-and-fourteenth-centuries-saint-bernard-and-saint-catherine-alexandria
treatment, the NGA scientific research department analyzed the painting using x-ray
![Italian Paintings of the Thirteenth and Fourteenth Centuries: Saint Bernard and Saint Catherine of Alexandria with the Virgin of the Annunciation [right panel], shortly before 1387 | National Gallery of Art](https://www.fragfinn.de/wp-content/uploads/screenshots/1764002570690b14c04aefd5.73467777.png)