France's President Emmanuel Macron says he wants the Notre Dame cathedral in Paris to be renovated within five years following yesterday's huge fire.
Mr Macron has addressed the nation - as a vigil is held for the devastated building in the French capital.
Around €600 million has already been raised to fund the renovation project.
Mr Macron says it's up to France to come together and change a disaster into an opportunity.
In a TV address, he said: "We will rebuild the cathedral and we will make it even more beautiful.
"I want that to be done within five years, because we can do it."
Although much of the cathedral's roof was destroyed, firefighters managed to contain the blaze and stop it spreading to other areas of the historic building.
Authorities said further destruction was averted during a crucial 30 minute period.
Most of the cathedral's priceless treasures and artefacts were saved, although work is continuing to determine the full extent of the damage.
While the investigation into the fire is still in its early stages, prosecutors currently believe it began accidentally.
However, officials have warned that the investigation will be "long and complex".
Workers and companies involved in renovation works at Notre Dame are being interviewed as part of efforts to establish what happened.