Work to restore the cathedral is not expected to begin until the beginning of 2022. Carpentry experts say rebuilding Notre Dame as it was will take 2,000 metres squared of wood, requiring about 1,500 oaks to be cut down. The cathedral’s roof contained so many wooden beams it was called la forêt (the forest). The roof’s support included 25 triangular structures 10 metres high and 14 metres across at the base, placed over the stone vaults of the nave.
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