Firefighters in Paris say the blaze which has destroyed parts of Notre Dame cathedral is now fully extinguished.
Its spire and much of the ancient roof collapsed last night - but the main structure, including the two bell towers, has been saved.
The cathedral has been a landmark of the French capital for over 800-years.
French President Emmanuel Macron say the country will rebuild Notre Dame Cathedral.
He visited the site of the fire last night.
One firefighter has been seriously injured in the blaze and local media say police are treating the blaze as an accident.
Notre-Dame is aflame. Great emotion for the whole nation. Our thoughts go out to all Catholics and to the French people. Like all of my fellow citizens, I am sad to see this part of us burn tonight. https://t.co/27CrJgJkJb
— Emmanuel Macron (@EmmanuelMacron) April 15, 2019
The cause of the fire, which was brought under control after nine hours, isn't yet clear.
A fund is being launched today to help pay for what could be a massive reconstruction project.
Terrible to see #NotreDame ablaze tonight. Such an iconic cultural landmark. Devastating for the people of Paris who are watching history burning.
— Leo Varadkar (@LeoVaradkar) April 15, 2019
Meanwhile, one of the richest men in France is donating one hundred million Euro to the reconstruction.
François-Henri Pinault, who's married to the actress Salma Hayek, says he wants to "revive the jewel of our heritage", and see the cathedral completely rebuilt.
He's the chairman and CEO of the Kering group, which owns fashion labels including Gucci and Yves Saint Laurent.
Parisians sang hymns as they watched the blaze yesterday evening.
The singing of Ave Maria in front of the tragic blaze of 850-year-old Notre Dame has an incredible sadness & beauty to it.
I can’t stop listening. pic.twitter.com/IO5t7M4UPf
— Dr Mike Galsworthy (@mikegalsworthy) April 16, 2019
— Ignacio Gil (@Inaki_Gil) April 15, 2019