Since World War I, the Cathedral has regularly benefited from the generosity of private donors, following the example of John D. Rockefeller, who largely paid for the reconstruction of its roofs. In addition to the State, which has funded 12 million euros for restorations since 1995, Notre-Dame Cathedral continues to be the focus of important donor-funded projects.

For example, in 2006 and 2007, copies of the statues the Queen of Sheba and the Man With the Head of Ulysses were created at the impetus of the Friends of the Cathedral Society. Current projects include the restitution by light projection of the famous labyrinth of Reims, and the restoration of the great rose window.