 However, as of 1972, the repainting done in various restorations had made the heads of Saint Peter, Andrew, and James differ significantly from the original design.The painting's appearance by the late 1970s had become badly deteriorated.From 1978 to 1999, Pinin Brambilla Barcilon guided a major restoration project which undertook to stabilize the painting, and reverse the damage caused by dirt and pollution.