Notre Dame spokesman Andre Finot told French media: "Everything is burning, nothing will remain from the frame".
The 12th-century cathedral is home to incalculable works of art and is one of the world's most famous tourist attractions. After emerging to face a throng of reporters, Marcon vowed the cathedral would be rebuilt and announced the launch of an worldwide fundraising drive to begin raising the millions of dollars necessary to restore the building to its former glory.
Laurent Nunez, speaking to reporters at the scene, says the devastating fire is not limited yet to a certain area and might continue to expand.
The peak of the 12th century cathedral is undergoing a 6 million-euro ($6.8 million) renovation project. It is loved by Parisians, by French people, indeed people all around the world.
On Monday, French President Emmanuel Macron also took to Twitter to express the structure's significance to France and pledge that it would be restored. Flames that began in the early evening burst through the roof of the centuries-old cathedral and engulfed the spire, which collapsed, quickly followed by the entire roof.
Sights of the flames stopped passers-by in their tracks along the Seine River that passes beneath the cathedral. French authorities suspect that the fire was somehow started due to this restoration work. It's unclear if anyone has been hurt in the fire.
According to French TV, the structure is likely to survive.
An huge tragedy is now unfolding in Paris as a fire has broken out in the world-famous Notre-Dame cathedral and is spreading rapidly. He says cause of fire at the cathedral is unknown.
Hidalgo urged residents of the French capital to stay away from the security perimeter around the Gothic-style church. She says smoke can be seen throughout the city.
The Friends of Notre Dame foundation has even been seeking to raise a massive €150 million ($180 million) from French citizens and Francophiles in the U.S. to help foot the bill for a major facelift.