The Victory of Heraclius over Chosroes: detail after cleaning superimposed over the diagnostic image in ultraviolet florescence. The florescent areas document the presence of shellac and organic sizing used by Piero della Francesca.

Proof of the True Cross: detail after restoration superimposed over x-ray photo taken before the intervention.

The Discovery of the Cross: detail after restoration superimposed over a photo taken before the intervention. The restoration revealed the original composition which had been previously altered.