Nancy-Thermal ensemble en Meurthe-et-Moselle

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Heritage classified

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Origin and history

Grand Nancy Thermal, formerly Nancy Thermal, is a major aquatic complex located in the Haussonville-Blandan-Donop neighbourhood of Nancy. Inaugurated in 1913, it houses the largest thermal water pool in the world (50 × 18 m), fed by a source discovered in 1908 by architect Louis Lanternier. The site, which also includes a round swimming pool and a wellness area, was completely renovated and reopened in 2023 after ambitious work. It has been included in the additional inventory of historic monuments since 3 November 2020 for its main hall, its round pool, and its characteristic galleries.

The thermal spring, springing at 36 °C with a flow of 1,500 l/min, was inaugurated at the International Exhibition of Eastern France in 1909. Initially used to treat arthritic conditions, its operation experienced interruptions, particularly between 2006 and 2011, due to the decline in yield of historical drilling. A new borehole (F4), launched in 2010, has enabled the reinvigoration of the site's 17 basins, as part of a sustainable and economical approach. The rehabilitation project, led by the Greater Nancy Metropolis, aimed to make it a modern thermal pole, inspired by models such as that of Amnéville in Moselle.

The complex experienced legal and technical difficulties prior to its reopening. In 2021 the Nancy Administrative Court terminated the concession contract for procedural failure, but this decision was annulled in 2022 by a mediation protocol, allowing the completion of the work. Managed since 2023 by Valvital, the site has finally opened its doors to the public after delays related to health non-compliances. Today, it offers thermal treatments, recreational and sporting water activities, as well as a wellness area, marking the renewal of the thermal tradition in Nancy.

Architecturally, the site is distinguished by its mix of Art Nouveau and Art Deco styles, reflecting the heritage of the École de Nancy. Protected features include the main hall, the round swimming pool (dating from the early 20th century), and the spring pavilion, which are witnesses to the city's industrial and seaside history. Located on the southwest outskirts of Nancy, near Sainte-Marie Park and Artem Campus, the complex integrates into a changing neighbourhood, between historical heritage and contemporary dynamism.

The swimming pools of the site, including the famous Olympic pool and the round swimming pool, are remains of the early decades of the twentieth century. Louison Bobet, later added, completes the offer. The thermal water, formerly used only for bathtubs and the round swimming pool, now supplies all the facilities thanks to drilling F4. This project is part of a desire to enhance the heritage of Lorraine, while responding to the modern challenges of tourism, health and sustainable development.

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