Veil of Veronica
The image was studied in detail in 1969 by Colette Dufour Bozzo, who dated the outer frame to the late 14th century, while the inner frame and the image itself are believed to have originated earlier. Bozzo found that the image was imprinted on a cloth that had been pasted onto a wooden board. The similarity of the image with the Veil of Veronica suggests a link between the two traditions.