The building's buttress are pictured at the Notre-Dame de Paris Cathedral in Paris. (Image: AP)
Parts of a destroyed ribbed vault and scaffolding are pictured at the Notre-Dame de Paris Cathedral in Paris. (Image: AP)
French Culture Minister Franck Riester listens to French chief architect of historical sites Philippe Villeneuvethe Notre-Dame de Paris Cathedral three months after a major fire in Paris. (Image: AP)
Parts of a destroyed ribbed vault and scaffolding are pictured at the Notre-Dame de Paris Cathedral in Paris. (Image: AP)
A hole is pictured at the Notre-Dame de Paris Cathedral three months after a major fire in Paris. (Image: AP)
Parts of a destroyed scaffolding are pictured at the Notre-Dame de Paris Cathedral in Paris. (Image: AP)
Scaffolding is seen during preliminary work on top of the Notre-Dame de Paris Cathedral in Paris. (Image: AP)
Parts of a destroyed ribbed vault and scaffolding are pictured at the Notre-Dame de Paris Cathedral in Paris. (Image: AP)
Scaffolding is seen during preliminary work on top of the Notre-Dame de Paris Cathedral in Paris. (Image: AP)
Workers stand next to an excavator robot at the Notre-Dame de Paris Cathedral in Paris. (Image: AP)
Workers are pictured during preliminary work at the Notre-Dame de Paris Cathedral in Paris. (Image: AP)
Workers stand next to an excavator robot at the Notre-Dame de Paris Cathedral in Paris. (Image: AP)
Workers stand next to an excavator robot at the Notre-Dame de Paris Cathedral in Paris. (Image: AP)
Workers stand next to an excavator robot at the Notre-Dame de Paris Cathedral in Paris. (Image: AP)
Excavators are pictured during preliminary work at the Notre-Dame de Paris Cathedral in Paris. (Image: AP)
French Culture Minister Franck Riester listens to French chief architect of historical sites Philippe Villeneuvethe Notre-Dame de Paris Cathedral three months after a major fire in Paris. (Image: AP)
Excavators are pictured during preliminary work at the Notre-Dame de Paris Cathedral in Paris. (Image: AP)
The big organ is pictured during preliminary work at the Notre-Dame de Paris Cathedral in Paris. (Image: AP)
The building's buttress is pictured during preliminary work at the Notre-Dame de Paris Cathedral in Paris. (Image: AP)
Workers are pictured during preliminary work at the Notre-Dame de Paris Cathedral in Paris. (Image: AP)
Workers are pictured during preliminary work at the Notre-Dame de Paris Cathedral in Paris. (Image: AP)