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Stéphane Demoustier

L'inconnu de la Grande Arche (The Great Arch)

Director Stéphane Demoustier Music (original) Olivier Marguerit Cast Sidse Babett Knudsen, Claes Bang, Xavier Dolan
104' - 2025 - Historical, Drama, Biography, Political - Format: DCP - Dialogue: Danish, Italian, French, English
In 1983, Danish architect Otto von Spreckelsen was commissioned to design the Grande Arche, a monumental landmark outside Paris. His visionary project soon ran up against bureaucracy, political intrigue, and technical hurdles. This compelling biopic charts a tragicomic struggle for artistic integrity, where ideals collide with power and personal sacrifice. A powerful portrait of unwavering conviction.
Like the Oscar-winning The Brutalist, the equally compelling L'inconnu de la Grande Arche is a film that balances idealism and tragedy, showing how one man anchors his soul in stone. With this biopic, Stéphane Demoustier (The Girl with a Bracelet) paints a portrait of Danish architect Johan Otto von Spreckelsen, commissioned in 1983 to design the Grande Arche in Paris’s La Défense business district. Claes Bang embodies this stubborn visionary with hypnotic intensity. His so-called “Cubo” is no mere building but a manifesto—a battle against bureaucracy and political interference. Demoustier reveals how von Spreckelsen defended his artistic purity to the bitter end, even at the cost of his health. L'inconnu de la Grande Arche is both a tribute to an artist’s uncompromising spirit and a sharp critique of how systems can suffocate creativity. True art, it insists, brooks no compromise.

Image gallery

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Credits

Directors

Stéphane Demoustier

Music (original)

Olivier Marguerit

Sound Designer

Eddie Simonsen

Cast

Sidse Babett Knudsen, Claes Bang, Xavier Dolan

Scenario

Stéphane Demoustier

Director of Photography

David Chambille

Editors

Damien Maestraggi

Producers

Muriel Meynard

Production studios

Ex Nihilo, Zentropa Entertainments ApS

Distributor

Cherry Pickers Filmdistributie

More info

Dialogue

Danish, Italian, French, English

Countries of production

Denmark, France

Screenplay based on

"La grande arche" (Laurence Cossé)

Year

2025

Filmography

Stéphane Demoustier
Première (short, 2008), Des noeuds dans la tête (short, 2010), Dans la jungle des villes (short, 2010), À main nue (short, 2010), Bad Gones (short, 2011), Fille du calvaire (short, 2012), Les petits joueurs (short, 2014), Terre battue (2014), Allons enfants (2018), La fille au bracelet (2019), Borgo (2023), L'inconnu de la Grande Arche (2025)

Technical Specs

Format
DCP