Notre Dame de Paris Cathedral

The Eiffage teams are proud of their contribution to the restoration of Notre Dame de Paris and the success of this stunning reconstruction, made possible by the combined expertise of two of our business lines working closely together: Eiffage Énergie Systèmes handled the technical macro-lot, while Pradeau Morin, a subsidiary of Eiffage Construction, was responsible for masonry and stonework.

Notre-Dame de Paris: two Eiffage business lines mobilised for a historic project

On 8 December 2024, Notre Dame de Paris reopened to the public, five years on from the fire that so seriously damaged the building.
The Eiffage teams are proud of their contribution to the restoration of this historic structure:

Eiffage Energie Systèmes took responsibility for the major technical works package.
Eiffage Construction, through its subsidiary Pradeau Morin, was responsible for the masonry and cut stone work.

An alliance of knowledge and expertise to help breathe new life into this unique monument.

Restoring this historic monument, which has touched our lives in one way or another, would not have been possible without the expertise, dedication, and tireless efforts of all the teams who worked relentlessly on this exceptional project. A beautiful tribute to the builders, to all the women and men whose work finds its ultimate meaning here.

Benoît de Ruffray Chairman and Chief Executive Officer of Eiffage

Key project dates

15 April 2019: A devastating fire destroys the cathedral roof and spire.
July 2020: Pradeau Morin wins the contract to restore cut stone for Notre-Dame de Paris.
September 2021: Work to secure and reinforce the building is completed, allowing the restoration phase to begin.
Early 2022: Reconstruction work begins.
January 2023: The public establishment Rebâtir Notre-Dame de Paris, the project owner for the cathedral's restoration, awarded the technical macro-lot to Eiffage Énergie Systèmes, lead contractor, in partnership with Lorraine Énergie and DEF. This macro-lot covers low and high voltage installations, heating, ventilation, air conditioning, plumbing, as well as the fire safety system and backup generators.
8 December 2024: Notre-Dame de Paris cathedral reopens.

Eiffage Énergie Systèmes, lead contractor for the technical macro-lot, contributing to a connected and intelligent cathedral

Eiffage Énergie Systèmes, in collaboration with Lorraine Énergie and DEF, was responsible for the entire technical macro-lot. This exceptional project included:

High and low voltage electricity,
Video surveillance and access control,
Fire detection systems,
Generators,
Heating and ventilation,
Plumbing.

Project owner: Rebâtir Notre-Dame de Paris – a public-sector body
Project managers: Philippe Villeneuve, Pascal Prunet and Rémi Fromont, ACMH

Video – join Noémie for an inside look at the electrical renovation of Notre Dame’s presbytery
Electrical systems project manager Noémie is overseeing the renovation of the presbytery. From the design phase onward, she has ensured that high-voltage installations – lighting and power outlets – and low-voltage systems – video surveillance, people counting and anti-intrusion – progress on schedule. Discover her daily routine on this absolutely incredible project!

Pradeau Morin: masonry and stonework for the restoration of Notre-Dame de Paris cathedral.

The UNESCO World Heritage-listed Notre Dame cathedral is an iconic masterpiece of medieval Gothic architecture. The restoration of this unique monument required traditional know-how passed down by its builders combined with modern techniques and cutting-edge technologies to meet the numerous technical challenges it posed.

Pradeau Morin Monuments Historiques, a subsidiary of Eiffage Construction, worked on the cathedral’s restoration as part of a consortium led by Lefèvre. Its teams were responsible for replacing stonework in various locations:

South Nave walkway
North and South Transepts (stone balustrade forming the parapet)
Corner of the South Tower

Project owner: Regional Department of Cultural Affairs
Architect: Benjamin Mouton – ACMH

Materials used

Blocks of Croix Huyart French limestone from the Aisne department were either workshop-cut or sculpted on site before being winched by crane to the top of the building. The materials used faithfully reflect the cathedral’s original construction period, in line with the decision to identically restore the monument using the original materials.

In addition to the 13th-century techniques, which we are quite familiar with, this project had a number of distinctive features. The large numbers of people involved, the painstaking organisation and the monument’s incredible prestige made this a truly unique project!

Frédéric Létoffé Director of Pradeau Morin Monuments

Behind the scenes – in images

Analysis of the distribution of equipment in the upper and lower sections of one of the chapels within the Choir of the cathedral.
Analysis of the distribution of equipment in the upper and lower sections of one of the chapels within the Choir of the cathedral.