Châlons Cathedral (French: Cathédrale Saint-Étienne de Châlons) is a Roman Catholic church in Châlons-en-Champagne, France, formerly known as Châlons-sur-Marne.

The cathedral is the seat of the Bishop of Châlons and was consecrated in 1147 October 26, by Pope Eugene III. The cathedral is also noted for its stained glass windows.

Jean-Jacques Arveuf-Fransquin designed the neo-Flamboyant west end organ case of Châlons Cathedral. The case was created by the cabinetmaker Etienne Gabriel Ventadour, and housed the 54-stop instrument made by John Abbey, who delivered the instrument in 1849.

The instrument was rebuilt and enlarged in 1898 by his sons Eugène and John-Albert, who delivered the largest instrument to come out of their workshop. After work by Max and André Roethinger in 1957, the organs were restored between 2000 and 2006 in the spirit (composition and harmonization) of 1898 by the Renault-Menoret company, then by Olivier Robert and Denis Lacorre.

The choir organ is by Merklin. They have both been classified as a Historic Monument since 2 July 1979.

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  12th-century stained glass windows
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  Cathedral before the 1668 fire
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  Nave
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  Organ
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  Choir and high altar

• List of Gothic Cathedrals in Europe

• Estrayez-Cabassolle, Abbé (1842). Notice historique et descriptive sur la cathédrale de Châlons-sur-Marne (in French). Châlons-sur-Marne: T.-J. Martin.
• Longnon, Auguste (1897). Cartulaire du chapitre de l'église cathédrale de Châlons-sur-Marne (in French). Paris: A.Picard et Fils.
• Lucot, Paul (1884). Les verrières de la cathédrale de Chalons: en général et plus particulièrement les verrières des collatéraux (in French). Chalons-sur-Marne: F. Thouille. [stained glass]
• Villes, Alain (2007). La Cathédrale Saint-Etienne de Châlons-en-Champagne et sa place dans l'architecture médiévale (in French). Langres: D. Guéniot. ISBN 978-2-87825-226-2.

• Catholic Hierarchy: Diocese of Châlons
• Catholic Encyclopedia: Châlons-sur-Marne
• Unofficial Cathedral website