Vatican admits Sistine Chapel frescoes ‘whitened’
Officials first noticed the whitening patina in 2010 and immediately launched an investigation
The Vatican revealed a closely-kept secret Thursday: The Sistine Chapel’s precious frescoes were starting to turn white from the air pollution caused by so many visitors passing through each day to marvel at Michelangelo’s masterpiece.
Officials first noticed the whitening patina in 2010 and immediately launched an investigation. The damage wasn’t visible from the ground, but close inspection showed pockets of frescoes covered with a powdery patina that caked them like cracked sugar icing.
While the exact origin is still unknown, officials told an academic conference that the powder consisted of calcium carbonate and calcium bicarbonate deposits, believed to have formed from the increasing levels of carbon dioxide and humidity passing through the chapel’s porous plaster walls.
The patina was easily removed and no permanent damage occurred, said Ulderico Santamaria, who heads the museums’ restoration laboratory.
Vatican officials have said the Sistine Chapel’s new air conditioning and air filtration system would prevent potential damage from the air pollution brought in by crowds, which near 6 million this year. But they never revealed that damage was already underway and that the new system was aimed at preventing further problems.
Santamaria said studies showed that the patina was superficial, and hadn’t bleached or mixed in with the actual colors, meaning the frescos themselves weren’t harmed. He said the patina wasn’t found on all frescoes, but was concentrated in some areas of the chapel, presumably where there was greater absorption of water from the humid air or condensation inside the walls.
“The state of the frescoes is good, and this whitening was reversible,” he said.
The head of the Vatican Museums, Antonio Paolucci, has ruled out closing the Sistine Chapel to protect the frescoes, but has said that 6 million visitors a year is the limit.
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