Paris – 13 May 2019:  As shown on ABC News CleanSpace Respirators are being worn by workers tasked with restoring Notre Dame just one month after a fire ravaged through the 850-year-old cathedral.

The fire burned through almost two-thirds of the roof and some 400 tonnes of lead. As a result, workers are wearing protective suits and CleanSpace Respirators to protect themselves from contamination.

Retired French Gen. Jean-Louis Georgelin, who is leading the restoration project, said the workers take regular blood tests to make sure their blood lead levels are still normal.

Watch the exclusive ABC news footage:  https://abcnews.go.com/International/notre-dame-abc-news-exclusive-inside-fire-ravaged/story?id=62992558