Restoring Montreal’s Notre-Dame Basilica: preserving a heritage gem
Since 2019, the Notre-Dame Basilica of Montreal, a neo-Gothic landmark in Old Montreal and witness to two centuries of history, is the subject of an ambitious restoration project. Considered as a giant puzzle by architects and workers alike, the project aims to preserve the architectural and artistic integrity of the building, while ensuring its perennity for future generations.
Published on Oct 29th 2025 2 min read.
A multi-phase project
The work, initiated by the Fabrique de la paroisse Notre-Dame de Montréal, the entity responsible for the basilica, will continue for another decade and is divided into eight distinct phases. The project is firstly concentrated on exterior restoration: masonry, flashings, bell towers, sculptures, and facades. Each stone is carefully numbered, removed, restored or replaced, then reinstalled in its original location. The twin towers, rising to over 60 metres, are particularly exposed to the elements and require special attention.
The interior, a treasure to be preserved
In addition to the consolidation work being done on the exterior, work is also being carried out inside the basilica. The painted decorations, the vaults adorned with gold leaf, the rood screens, and the side walls must be restored using advanced conservation techniques: strengthening the plaster, cleaning oxidized varnishes, retouching pigments, and applying protective varnishes, among other approaches put into practice. To this we add the numerous other techniques applied to various interior elements and decorations. In each case, a combination of traditional know-how and highly advanced tools are required to successfully complete the work.
Funded by the community
The work is being carried out by La Fabrique, a non-profit organization, and is not eligible for government subsidies. This means that funding for the restoration project relies on contributions from the public, visitors, parishioners, and patrons. Cultural events, such as concerts and guided tours, also contribute to the fundraising efforts. The current major fundraising campaign is being orchestrated by the Notre-Dame Basilica of Montreal Foundation, with La Fabrique mobilizing the community around this mission to preserve the building.
A heritage mission
“The basilica’s first stone was laid in 1824, and construction was completed in 1829, therefore we will soon be celebrating its 200th anniversary,” said Michel Issa, Chief Executive Officer of La Fabrique de la paroisse Notre-Dame de Montréal. “After nearly two centuries of existence, during which the building has weathered as many summers as winters, major restoration work is underway to prepare the basilica for another century. I wish to express a great ‘Thank you!’ to each person and organization who contributes to the financing of the restoration work. I like to think that my thanks are also offered on behalf of the people who will be able to admire the splendor of the basilica in the future!”
