September 25, 2026

Notre-Dame Basilica: cracking stones

Nearly two hundred years of harsh weather have taken their toll on many of the stones that make up the towers of Montreal’s Notre-Dame Basilica. Some stones were even in danger of collapsing. Today, the restoration of these towers and the replacement of these stones pose unexpected technical, aesthetic, and heritage challenges.

Published and updated on August 19, 20251 min read

Watch this episode of Découverte on Radio-Canada’s website (only available in French).

Other articles

Long-term work

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.

In numbers

The Basilica’s grand Casavant organ

Standing proudly on the north side of the building since 1891, the grand Casavant organ of Montreal’s Notre-Dame Basilica is much more than a decorative instrument: indeed, it is a monument within a monument. As large as a two-story house and featuring 7,000 pipes, every technical detail reflects both the boldness of Quebec’s organ builders and the unique acoustics of the Neo-Gothic nave.

Light and colours

The stained-glass windows of Notre Dame: from creation to conservation

The magnificent stained- glass windows of Montreal’s Notre-Dame Basilica are much more than decorations: they are true works of art, created with patience and skill, each telling a story and illuminating the interior of the church with polychromatic light. How were they made? And how must they be maintained in order to preserve their beauty and strength over time?

Admission fees

The Notre-Dame Basilica of Montreal: a heritage site to be protected

Visitors are sometimes surprised to learn that there is an admission fee to enter Montreal’s Notre-Dame Basilica, a place of worship. For many, a church should remain a space open to all, a sanctuary that anyone may enter freely, whether to pray, marvel at its beauty, or simply seek a moment of silence. However, the reality of this unique site is different.

Lasting donation

5 Good Reasons to Give to the Notre-Dame Basilica of Montreal Foundation

The fundraising campaign for the restoration of Montreal’s Notre-Dame Basilica relies heavily on public generosity. Here are five concrete reasons to donate, supported by figures, issues, and motivations.