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| Valentina Pop, Drew Hinshaw, Nick Kostov - The Wall Street Journal. - Sunday, April 21, 2019 |
PARIS—Years before flames ravaged Notre Dame Cathedral, the landmark's custodians realized they had a problem.
In 2013, the cathedral hired Didier Dupuy and his son to scale the building and install lightning rods at different points, including its central spire. Gaping holes and cracks they discovered in the lead roofing shocked them. Just below was a dry and dusty space of timber beams, known as "the forest," that had supported Notre Dame's roof for centuries.