©Wilmotte & Associés Architectes

Installed for four years on the Joffre plateau, on the axis of the Champ-de-Mars, in Paris’s 7th arrondissement, the ephemeral Grand Palais opened its doors in June 2021. It faces the Ecole Militaire with the Eiffel Tower and the Trocadéro as its sightline. This temporary building, designed by the Wilmotte & Associés architectural practice, sponsored by the Réunion des Musées Nationaux-Grand Palais and Paris 2024, and managed by GL Events, is a descendant of the great structures of the Universal Exhibitions of the  nineteenth and early twentieth centuries.

During the renovation of the Grand Palais, it accommodates the art, fashion and sporting events usually hosted in the main hall, as well as the cultural and artistic events organised by RMN-Grand Palais. It will also be the setting for events at the 2024 Olympic and Paralympic Games: judo, wrestling, wheelchair rugby and para judo are on the programme. At the end of the four years of operation, the building will be dismantled and its components will be reused in new buildings.

Temporary but sustainable

The unique and iconic architecture of this ephemeral Grand Palais meets the requirements of contemporary eco-construction. The choice of a structure in timber that comes from sustainably managed forests, modular, quick to assemble (three months), but also capable of being dismantled and reused in different configurations, entailed precision prefabrication and assembly.

In addition to the structural components, the envelope components, and in particular the sandwich panels manufactured from steel sheet and stone wool, will be able to be reused. Some municipalities have already expressed their interest. The long-term future of the components appears to be assured. To be continued, therefore. The construction method was also designed to limit nuisance from the construction site, which lasted eight months in total.

Paris, France

Project location

An Ephemeral Grand Palais

Assembly commenced with the installation of the two 65-metre span hip rafters that form the keystone, resting at the connection point on a temporary shoring tower while awaiting assembly of the transverse wings. Then the arches were installed one by one.

Julie Jean

architect and project manager of the Wilmotte practice
The acoustics are greatly appreciated by all users because there is very little reverberation

Juliette Armand

Venue’s Director of Events and Operations
It’s the acoustics that dictated the dimensioning of the insulation system.

Julie Jean

architect and project manager of the Wilmotte practice
Stone wool insulated sandwich panels required for this building:
  • 820 m² of Vulcastell Wall FC 80 mm
  • 9,550 m² of Vulcastell Wall FC 120 mm, EI 60 fire resistance
  • 510 m² of Vulcastell Wall FC 200 mm, EI 180 fire resistance

All were produced using ROCKWOOL stone wool insulation.

Graphic rendering of stone wool sandwich panels

Project Data


RMN-Grand Palais, Paris 2024 Organising Committee for the Olympic and Paralympic Games

Managing operator

GL Events


Wilmotte & associés architectes


Chabanne engineering and energy (structure and services); Lamoureux (acoustics); CSD (safety, fire safety systems coordinator); Lisi (smoke extraction), Cronos (public safety); Socotec (project supervision).


Mathis (framing), IASO (roofcovering, lining), Laporta (structural work), Sodimav (acoustic panels), Swal (interior fabric), SNEF (electricity), Andreu (HVAC), Medinger (Roads and services)…

Sandwich panel suppliers

Trimo for the roofcovering and ArcelorMittal Construction for the northeast and southwest facades.

Surface area

Approximately 10,000 m²

Cost of construction

€ 44 million excluding taxes