Le défilé. liberté, egalité, sororité"you're worth it" l'oréal paris: runway paris fashion week womenswear s/ 2026

Ephemeral architecture: creating immersive worlds for an evening

Ephemeral architecture embodies a fascinating paradox: devoting considerable energy to something that will only exist for a few hours. But isn't it precisely this fleeting nature that makes the experience so precious? In a world saturated with permanent images, the unique moment becomes the ultimate luxury.
19 September 2025

Transforming a public square into a haute couture catwalk. Turning an industrial hall into an enchanted palace. Creating a dreamlike world in a classic space. This is the essence of temporary architecture: a discipline that reinvents space to create unforgettable experiences.

When Paris becomes the backdrop for legends

On September 29, 2025, the capital demonstrated its mastery of the ephemeral art. For Fashion Week, L’Oréal Paris transformed the square in front of City Hall into a monumental open-air catwalk, welcoming Kendall Jenner, Eva Longoria, and Philippine Leroy-Beaulieu. An XXL stage design that reinvented the republican motto as “Liberty, Equality, Sorority,” proving that a heritage site can become, for one evening, the global epicenter of beauty while carrying a powerful message.

That same week, Saint Laurent kicked things off with an equally striking staging, perfectly illustrating the power of ephemeral architecture: transcending a place while respecting its original identity.

The alchemy of spatial metamorphosis

According to the 2025 trends identified by industry professionals, temporary architecture is no longer limited to installing decorations. It is now based on three strategic pillars: structural scenography that redesigns volumes, the sensory atmosphere created by lighting and sound design, and spatial storytelling that transforms each area into a chapter of an immersive narrative.

Light becomes a sculptor of space, creating areas of shadow and revelation that naturally guide the way. Light fixtures are transformed into true works of art, as highlighted by the current trend toward expressive designs where the decor becomes a spectacle in itself.

The dialogue between heritage and boldness

Paris is full of heritage sites whose elegance might seem frozen in time. Yet it is precisely these spaces that offer the greatest potential: an 18th-century mansion becomes the setting for an immersive tech product launch, a barge on the Seine is transformed into a tropical lounge.

Ephemeral architecture never denies its place of origin: it dialogues with it. Haussmannian moldings become a backdrop for contemporary light displays. Industrial glass roofs host spectacular floral installations that magnify their metal structure. This duality between permanence and ephemerality creates a fascinating creative tension: seeing a familiar place completely reinvented provokes wonder.

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Technical excellence at the service of emotion

Creating these worlds requires advanced technical expertise that we have cultivated over many years. We orchestrate each project by collaborating with our set designers, interior designers, lighting designers, and sound designers. Our expertise lies in setting up, testing, and ensuring the perfect functioning of a device in just a few hours, then dismantling it without leaving a trace. This ultra-fast construction under pressure, characteristic of event architecture, requires creativity and precision execution techniques that we have mastered perfectly.

Our tailor-made scenography responds to specific strategic challenges. For a luxury brand, we create a setting that matches its positioning. For a tech company, we bring innovation to life. For a corporate event, we reinforce the corporate culture by visually translating its values. Each project we design becomes a statement of intent, driven by our bold vision of Parisian events.

The luxury of a unique moment

Ephemeral architecture embodies a fascinating paradox : devoting considerable energy to creating something that will only last a few hours. But isn’t it precisely this transience that makes the experience so precious ?

In a world saturated with permanent, reproducible images, offering a unique, fleeting moment becomes the ultimate luxury. Guests may not always remember the menu or the speeches, but they will remember the moment they entered this transformed space. That feeling of traveling somewhere else without leaving Paris.

Ephemeral architecture leaves no physical traces, but it engraves indelible memories. It transforms an event into a memorable experience that people will still be talking about months later. Because ultimately, creating an immersive universe for an evening offers much more than just spectacular decor: it creates emotion, connection, and wonder. It’s transforming the ordinary into the extraordinary.

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