The Basilica of Saint-Denis, near Paris, is regarded as the cradle of Gothic architecture. Throughout its history spanning several centuries, this priceless church has endured many difficult moments, including the loss of one of its towers. The section, which was dismantled in the mid-19th century, is now returning to the skyline of Saint-Denis. Work began in 2025 and is expected to take four years. The reconstruction of the missing section will cost a total of around 37 million euros.
The cradle of Gothic architecture and the burial place of French monarchs
The Basilica of Saint-Denis (Saint Denis of Paris) occupies a unique place in the history of European architecture. It was here, in the 12th century, that Abbot Suger began the reconstruction of the church’s choir, introducing ribbed vaults, pointed arches and an extensive system of buttresses. These innovations set the course for the development of Gothic architecture for centuries to come. The church also became the burial place of almost all the kings and queens of France. In the first half of the 13th century, its western façade was enhanced by two towers, the northern of which was crowned with a slender stone spire approximately 90 metres high. For over 600 years, it dominated the surrounding area and was one of the tallest structures in medieval France, becoming a model for many later Gothic cathedrals.
The Basilica of Saint-Denis without one of its spires
In 1837, the spire was struck by lightning, causing serious damage to its structure. The architect François Debret carried out the necessary repairs, but experts soon raised doubts about their durability. Subsequent gales and storms between 1842 and 1845 led to further cracks – experts concluded at the time that continued use of the church posed a risk of structural collapse. Consequently, in 1846, a decision was taken to dismantle the upper part of the tower, including the spire. The demolition was completed a year later under the supervision of Eugène Viollet-le-Duc, who deemed it the only safe course of action. It was at this point that the basilica lost its distinctive silhouette, familiar to the French for hundreds of years. Almost immediately after the dangerous structure had been removed, calls were made for its reconstruction, but there was a lack of funds and approval from the relevant authorities. No one could have imagined at the time that the Basilica of Saint-Denis would have to wait nearly 180 years for the spire to be restored.
Reconstruction based on historical sources and traditional craftsmanship
A breakthrough in the matter did not come until after 2013, with the formation of the Suivez la flèche association. Two years later, the initiative was endorsed by the President of France, François Hollande, and in 2017 the National Monuments Commission issued a favourable opinion. An official agreement was signed in March 2018 between the Ministry of Culture, the Centre des monuments nationaux, the Diocese of Saint-Denis and the association leading the entire project. Importantly, the reconstruction of the tower is not a creative interpretation of medieval architecture. A team of heritage specialists is reconstructing the missing part of the cathedral in accordance with its appearance prior to demolition, using drawings by François Debret, archival measurements, surviving stone elements, laser scans and 3D models prepared by the studios 2BDM Architectes and Art Graphique & Patrimoine. The main concept for the reconstruction was developed by Jacques Moulin, the long-standing chief architect for French historic monuments, whilst Christophe Bottineau is currently responsible for its implementation.
Europe’s largest workshop for traditional crafts
The stone blocks used in the work come from historic quarries and have properties similar to the material used in the Middle Ages. Stonemasons work on them by hand using traditional tools, whilst the oak roof truss is prepared by carpenters working according to traditional techniques. These classical construction methods are supported by geotechnical research, digital documentation and 3D modelling, ensuring that every element is subject to the highest standards of quality control. Next to the basilica is the open workshop, the Fabrique de la flèche, where visitors can watch stonemasons, sculptors, carpenters and blacksmiths at work. The organisers describe it as Europe’s largest project promoting historical building crafts.
The Basilica of Saint-Denis is being restored to its former glory
The foundation stone was ceremonially laid on 14 March 2025 in the presence of the Minister for Culture, representatives of the authorities and the historian Stéphane Bern, the project’s ambassador. In early 2026, the first sections of the north tower were completed, and following a winter break, the installation of further stone blocks resumed. The project, worth around 37 million euros, is funded by the Île-de-France Interdepartmental Solidarity Fund, the Île-de-France region, the Greater Paris Metropolis, private sponsors and the Heritage Foundation. Donors can symbolically ‘adopt’ one of the more than 15,000 stone blocks of the future tower, receiving a certificate linked to a specific element. If the pace of work is maintained, in 2029 the basilica will regain the silhouette familiar from medieval times. This will be a highly symbolic moment, marking the completion of one of the most long-awaited restorations of historic monuments in France.
Source: saint-denis-basilique.fr
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