Notre Dame Cathedral is set to be closed for up to six years after the devastating fire which ripped though the iconic building.
The Rector of the Cathedral said the Paris cathedral will be closed for five to six years, to allow the building to be rebuilt and restored.
Following the blaze on Monday night, which toppled the spire and destroyed two thirds of the roof, millions of pounds have been pledged by France's richest families to rebuild the landmark.
Actress Salma Hayek's husband Francois-Henri Pinault and his family have pledged €100million (£86million) to help return the building to its former glory.
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Mr Pinault is chief executive of international luxury group Kering, which owns brands such as Gucci and Yves Saint Laurent, and is the president of French holding company Groupe Artemis, which owns the Christie's auction house.
Another French billionaire, Bernard Arnault, owner of LVMH Group, which includes Louis Vuitton and Fendi, has pledged €200m.
He said in a statement: "The Arnault family and the LVMH group would like to show their solidarity at a this time of national tragedy, and are joining up to help rebuild this extraordinary cathedral, which is a symbol of France, of its heritage and of French unity."
French president Emmanuel Macron made an impassioned speech on Monday night where he said: "I am solemnly telling you tonight: this cathedral will be rebuilt by all of us together."
Describing Notre Dame as "our history" and "the epicentre of our lives", he added: "It's probably part of France's destiny and it will be our project for the years to come."
France's Fondation du Patrimoine, a private organisation which works to protect French heritage, said it would be starting an international appeal.
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It tweeted: "For our Lady to be reborn from her ashes we are launching an international appeal.
"All donations received will be paid in full to the restoration site."
The US-based French Heritage Society also said it would be establishing a restoration fund, while several appeals have already been set up on crowdfunding sites such as GoFundMe and Just Giving.
