This article is an outcome of the study, deci-sions, and restoration work undertaken during the inte-grated conservation project of the 16th century paintingsof Funchal’s Cathedral main chapel’s altarpiece, inMadeira Island, Portugal. After diagnostic research hasallowed a complete understanding of the original mate-rial of the 12 Portuguese–Flemish paintings, it has beenrevealed the presence of other superimpo...