Bags of lead are seen at the reconstruction site of the roof of the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. =
French President Emmanuel Macron speaks with a worker and the French Army General Jean-Louis Georgelin in front of a stained glass window under the damaged vaults during a visit at the reconstruction site of the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. Ian Langsdon/Pool via REUTERS
A bird statue is seen at the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, with buildings and rooftops in the background in Paris, France, April 15, 2021.
French President Emmanuel Macron, Paris Mayor Anne Hidalgo and French Army General Jean-Louis Georgelin, in charge of Notre-Dame Cathedral reconstruction, visit the reconstruction site of the roof of the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. Ian Langsdon/Pool via REUTERS
A workman stands on scaffolding under the vault at the reconstruction site during French President Emmanuel Macron's visit at the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. Ian Langsdon/Pool via REUTERS
Workers at the reconstruction site of the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021.
View of the reconstruction site of the roof of the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021.
Employees measure an oak tree selected to be used to rebuild the spire and the roof of the Notre-Dame de Paris Cathedral destroyed by fire in 2019, in the Berce forest in Jupilles, France, March 8, 2021.
A crane and scaffolding at the reconstruction site of the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021.
Scaffolding at the reconstruction site at the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021.
Workers at the reconstruction site of the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021.
Busy workers are seen near a stained glass window under the vaults at the reconstruction site during a visit of the French President at the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. Ian Langsdon/Pool via REUTERS
A general view of the main scaffolding under the vaults at the reconstruction site during a visit of the French President at the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. Ian Langsdon/Pool via REUTERS
Workers stand on a scaffolding under the vaults at the reconstruction site during a visit of the French President at the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. Ian Langsdon/Pool via REUTERS
Workers look at the vaults at the reconstruction site during a visit of the French President at the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. Ian Langsdon/Pool via REUTERS
Workers at the reconstruction site of the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021.
Workers at the reconstruction site of the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. R==
A worker at the reconstruction site of the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021.
View of the reconstruction site of the roof of the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021.
French President Emmanuel Macron, Paris Mayor Anne Hidalgo and French Army General Jean-Louis Georgelin, in charge of Notre-Dame Cathedral reconstruction, visit the reconstruction site of the roof of the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. Ian Langsdon/Pool via REUTERS
Workmen plaster stonework as they rappel down a vault at the reconstruction site during French President Emmanuel Macron's visit at the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. Ian Langsdon/Pool via REUTERS
Wooden beams supporting a vault are pictured at the reconstruction site during French President Emmanuel Macron's visit at the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. Ian Langsdon/Pool via REUTERS
A workman stands on scaffolding under a vault at the reconstruction site during French President Emmanuel Macron's visit at the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. Ian Langsdon/Pool via REUTERS
Scaffolding under a vault is pictured at the reconstruction site during French President Emmanuel Macron's visit at the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. Ian Langsdon/Pool via REUTERS
View of the reconstruction site of the roof of the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021.
Workers at the reconstruction site of the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021.
A worker looks at the roof of the reconstruction site during a visit of the French President at the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. Ian Langsdon/Pool via REUTERS
A scaffolder works under the vaults at the reconstruction site during a visit of the French President at the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021. Ian Langsdon/Pool via REUTERS
A view shows the reconstruction site of the roof of the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021.
Workers at the reconstruction site of the roof of the Notre-Dame de Paris Cathedral, which was damaged in a devastating fire two years ago, as restoration works continue, in Paris, France, April 15, 2021.
Rebuilding the fire-damaged Notre Dame Cathedral