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Why Notre-Dame Was Built for Medieval Music

By Lorris Chevalier

When you walk into Notre-Dame de Paris, the air feels alive with echoes of the past. This iconic cathedral was more than a masterpiece of Gothic architecture—it was a giant musical instrument designed to bring medieval melodies to life. Its soaring nave and reverberant acoustics elevated the groundbreaking compositions of organum, transforming the space into a sanctuary where music and architecture intertwined.

The architectural design of Notre-Dame de Paris not only represents a triumph of Gothic engineering but also serves as an acoustic vessel for a specific, now largely forgotten, style of medieval music called ‘organum.’ This style, particularly associated with the ‘Notre-Dame School,’ was pioneered by composers like Léonin and Pérotin in the 12th and early 13th centuries. Pérotin’s compositions, characterised by complex layers of polyphony, relied heavily on acoustics that could sustain and amplify overlapping vocal lines.

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Notre-Dame’s vast nave, high ceilings, and massive stone pillars create a reverberant environment that enhances this music. The design allows notes to hang in the air, intertwining to produce a deeply resonant and almost mystical auditory experience.

The Cathedral as an Instrument for Polyphony

Pérotin’s music is celebrated for its innovation in polyphony, which involves multiple independent vocal melodies sung simultaneously. This approach was revolutionary for its time, departing from the monophonic chants common in earlier medieval music. His organum style, often performed with long, sustained tenor lines overlaid by two or more faster-moving upper voices, would be difficult to appreciate in a smaller or less reverberant space.

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In Notre-Dame, however, the cathedral’s architecture amplifies the sounds. It supports the lengthy, drawn-out notes and intricate rhythms that define Pérotin’s work, creating a natural echo chamber that enhances the music’s complexity and depth.

Brian F.G. Katz, a researcher in acoustics from Sorbonne Université, has highlighted how Notre-Dame’s design specifically complements this musical tradition. In 2013, Katz and his team took detailed measurements of the cathedral’s acoustics, just six years before the devastating 2019 fire, to capture the nuances of its unique soundscape.

Their findings revealed that Notre-Dame’s vaults and spaces created a long reverberation time of around 8 to 9 seconds. This unusually lengthy reverberation allows sound waves to mix and resonate in harmony with the Notre-Dame School’s musical style.

In the 12th century, composers like Pérotin might have intuitively understood the impact of architecture on their music. They created compositions that capitalised on the echoing acoustics of the cathedral. Unlike modern music venues, which are built to enhance spoken word clarity or instrumental precision, Notre-Dame was constructed in an era when the cathedral itself was part of the worship experience.

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This setting amplified both the sacred and aesthetic aspects of the music, enveloping the congregation in a powerful auditory experience that elevated the liturgy. As Katz points out, the space wasn’t adapted to the music over time; rather, the music was composed with the cathedral’s acoustics in mind, making it an intentional fusion of art and environment.

This synergy between architecture and music explains why medieval historians and acousticians are so passionate about preserving not just the structure of the cathedral but also its acoustic properties. Katz and other experts are working to ensure that, as the cathedral is restored, these unique acoustics are preserved.

If successful, this would allow future generations to experience the space as it was intended—a place where Pérotin’s polyphony can resonate with all the richness and depth it originally had.

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Dr Lorris Chevalier, who has a Ph.D. in medieval literature, is a historical advisor for movies, including The Last Duel and Napoleon

Further Readings:

Brian F.G. Katz and Antoine Weber, An Acoustic Survey of the Cathédrale Notre-Dame de Paris before and after the Fire of 2019, Topic Collection Historical Acoustics Edited by Dr. Francesco Aletta, 2020

See also: Reconstructing the Acoustics of Notre Dame

Top Image: Photo by adek Kucharski /Flickr

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