Scroll down to see more photographs from the fire and its aftermath, and find out how restoration plans are going
The Paris fire brigade's heroic efforts were lauded. Brigade chaplain Jean-Marc Fournier braved the flames to rescue sacred relics of the Christian faith - including this Crown of Thorns. Christians believe it was worn by Jesus Christ during his crucifixion.
Before restoration could begin, an enormous clean-up operation was required, while the building also had to be secured. In addition to the careful removal of priceless artefacts, 400 tons of lead from the roof and spire burned during the blaze threatened the collapse of the entire edifice.
Decontamination teams wearing hazmat suits had to use ultra-high pressure water hoses filled with chemical detergent to be vacuumed up, taking toxic lead dust with it.
The clean-up should be finished in the summer, allowing full restoration works to begin in early 2022.
A final budget for the total cost of renovation work is not yet finalized, but Robert Read of London insurer Hiscox recently told Reuters it would be comparable to the $8 billion worth of work being undertaken at the British Parliament buildings.
Just under $1 billion worth of funding was collected in donations after the fire, but this has not been without controversy. Last October the French court of auditors published a report insisting that all donations must not be used to fund the public body overseeing the restoration, but directly fund the cathedral's reconstruction.
The auditors found that the organization running the project was wrongly using $5.8 million in funds to pay the salaries of 40 members of staff, along with other costs.