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Origin and history

Notre-Dame-de-la-Treille Cathedral, located in the Old Lille district, is a neo-Gothic building erected in honour of the Virgin Mary. Its name comes from a miraculous statue, an object of devotion since the thirteenth century, once housed in the Collège Saint-Pierre, destroyed during the French Revolution. The construction of the cathedral, which began in 1854, had a dual purpose: to rebuild a large church in the heart of Lille and to promote the creation of an episcopal seat in this expanding industrial city.

The project was led by a commission of representatives of the Lille clergy and industrial bourgeoisie, led by Charles Kolb-Bernard. An international competition was launched in 1854 to design a building inspired by the 13th century Gothic. Although the first awards were awarded to English architects, objections led to the eventual assignment of the design to the architect Charles Leroy. The work, hampered by financial and technical difficulties, lasted almost 150 years, from 1856 to 1999.

The cathedral, originally a simple votive chapel, was erected as a minor basilica in 1904 by Pope Pius X. It became cathedral in 1913, when the diocese of Lille was founded, then metropolitan cathedral in 2008, with the elevation of Lille to the rank of archdiocese. Its architecture, marked by neo-Gothic influences and modern techniques such as reinforced concrete, reflects stylistic and technological developments that occurred during its long construction.

The current façade, inaugurated in 1999, is a contemporary work designed by architect Pierre-Louis Carlier, combining a metal structure with Portuguese marble plates. It replaces a temporary brick facade, abandoning the initial project of two towers surrounding a rosette. The interior of the Gothic-style cathedral includes a nave, a transept, a choir and radiant chapels richly decorated with mosaics, stained glass and sculptures.

The cathedral also houses a semi-entered crypt, one of the largest in Europe, which served as a burial place for several Lille bishops and local personalities. This crypt, built of brick and white stone, reproduces the configuration of the upper building. It was rehabilitated and reopened to the public in 2022, after more than 25 years of closure.

Notre-Dame-de-la-Treille is a symbol of Lille Catholicism, mixing medieval heritage, bourgeois ambitions of the 19th century and architectural modernity. Its history reflects the social tensions, religious aspirations and urban developments of Lille, from the industrial revolution to the present day.

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