Retouching and Over-painting

Changes have been made on the original composition. For example, all the leaves we now see in the laurel wreath are painted over the original leaves. The newer leaves are more in numbers and have different shapes than the overpainted original leaves as one can see in the overlay image above to the left. The overlay image consists of an x-ray image of the head and a corresponding transparent image of the head laid on top of the x-ray image. Based on pigments found in the newer leaves the overpainting must have taken place after the early 18th century.