(FILES) This file photo taken on June 26, 2018 shows the transcept of Notre Dame de Paris Cathedral. - Paris was struck in its very heart as flames devoured the roof of Notre-Dame cathedral, causing a spire to collapse and raising fears over the future of the nearly millenium old building and its precious artworks. Around 400 firefighters battled through the night, declaring only at around 10 am on April 16 that the fire had finally been extinguished but French Culture minister warned that the structure remained unstable and that no one had yet been able to fully inspect the extent of the fire and water damage inside. (Photo by Ludovic MARIN / AFP)

(FILES) This file photo taken on February 1, 2004 shows the organ of Notre Dame de Paris Cathedral, one of the most famous in the World. - Paris was struck in its very heart as flames devoured the roof of Notre-Dame cathedral, causing a spire to collapse and raising fears over the future of the nearly millenium old building and its precious artworks. Around 400 firefighters battled through the night, declaring only at around 10 am on April 16 that the fire had finally been extinguished but French Culture minister warned that the structure remained unstable and that no one had yet been able to fully inspect the extent of the fire and water damage inside. the organ appeared to have been "badly damaged" as had many paintings and frescos. (Photo by STEPHANE DE SAKUTIN / AFP)

(FILES) This file photo taken on February 1, 2004 shows the organ of Notre Dame de Paris Cathedral, one of the most famous in the World. - Paris was struck in its very heart as flames devoured the roof of Notre-Dame cathedral, causing a spire to collapse and raising fears over the future of the nearly millenium old building and its precious artworks. Around 400 firefighters battled through the night, declaring only at around 10 am on April 16 that the fire had finally been extinguished but French Culture minister warned that the structure remained unstable and that no one had yet been able to fully inspect the extent of the fire and water damage inside. The organ appeared to have been "badly damaged" as had many paintings and frescos. (Photo by STEPHANE DE SAKUTIN / AFP)

(FILES) This file photo taken on February 1, 2004 shows the organ of Notre Dame de Paris Cathedral, one of the most famous in the World. - Paris was struck in its very heart as flames devoured the roof of Notre-Dame cathedral, causing a spire to collapse and raising fears over the future of the nearly millenium old building and its precious artworks. Around 400 firefighters battled through the night, declaring only at around 10 am on April 16 that the fire had finally been extinguished but French Culture minister warned that the structure remained unstable and that no one had yet been able to fully inspect the extent of the fire and water damage inside. The organ appeared to have been "badly damaged" as had many paintings and frescos. (Photo by STEPHANE DE SAKUTIN / AFP)