Euronews takes a virtual tour of the monument, looking at the restoration work that was being conducted prior to the lockdown.
The Paris cathedral was ravaged by flames a year ago. Now the coronavirus lockdown is putting its rescue at risk.
Monsignor Patrick Chauvet said the fire-damaged Notre Dame is so fragile that “there is maybe a 50% chance that it will be saved."
The cathedral was severely damaged in a devastating fire in April.
"The relevant authorities, including the diocese... neglected to assist residents, visitors and workers, allowing them to be exposed to the toxic fallout," the NGO said in its lawsuit.
French authorities have no grounds to believe that the fire that wrecked Paris' Notre-Dame Cathedral in April was the result of criminal activity, although they are looking into the possibility of negligence, said the Paris prosecutor's office.
Two months after a devastating fire destroyed the cathedral's spire and roof, the Archbishop of Paris, Michel Aupetit, held mass for the anniversary of the cathedral's dedication as a place of prayer.
France President Emmanuel Macron has said he wants the structure renovated in five years. But opposition MPs have been critical, saying it is unrealistic and motivated by the fact Paris is hosting the Olympic Games in 2024.
The roof renovation company repairing Notre Dame's roof confirmed to Euronews their workers smoked on top of the roof but denied it being at the origin of the fire that ravaged the gothic monument a week ago.
Parisians held Easter mass at the smaller Saint-Eustache catholic church after Notre-Dame was devastated in a fire on Monday.
Interior Minister Christophe Castaner said on Friday that "the rioters have visibly not been moved by what happened at Notre-Dame."
Three churches destroyed by fires in the United States have seen a spike in donations following the flooding of funds to Notre-Dame Cathedral.
Firefighters who battled the Notre-Dame blaze were honoured at the Elysee Palace on Thursday (April 18).
Drone footage shows for the first time the aerial view of damage to the roof.
Global landmarks have been illuminated in the French tricolour in solidarity with the Notre Dame after a devastating fire ripped through the Paris cathedral on Monday
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Several cities in Hungary have offered donations toward the reconstruction of Notre Dame as a form of repaying kindness to Paris, which sent help during a natural disaster in Hungary more than a century ago
Some French political parties have suspended their European election campaigns after the fire that ravaged the iconic Notre Dame cathedral on Monday night.
Amid the launch of a national collection to fund repairs for the Notre Dame cathedral, some of France's richest families and firms have already pledged millions of euros.