The accidental discovery of the KIND spring in 1846 during drilling operations in search of rock salt gave rise to the thermal spa site of Mondorf-les-Bains in Luxembourg.

The pavilion built in the 1960s to showcase this thermal spring experienced periods of activity before gradually falling into neglect.

Faced with its deterioration and structural issues, a comprehensive adaptive reuse study was undertaken by the public authorities, offering an opportunity to preserve this emblematic example of the architectural experimentation of the 1960s.

The architects embraced the challenge by preserving the pavilion’s innovative features, notably its lightweight steel structures and reflective glazing techniques. The upper floor, now transformed into an orangery, blends harmoniously with the surrounding park, creating a planted space that enriches the landscape even during the winter months. On the ground floor, the spaces were redesigned to host various exhibitions, while the issues of thermal regulation and waterproofing were resolved through the introduction of a new glass membrane.

The areas surrounding the pavilion were also redesigned to strengthen its integration within the park. A steel and timber footbridge now connects the pavilion to the adjacent square, symbolizing both a connection and a subtle separation between the two spaces. In addition, the new timber cladding on the balconies creates an aesthetic continuity, emphasizing the pavilion’s square geometry and distinguishing it from its surroundings.

This project embodies a sensitive and meaningful approach to architectural preservation.

By safeguarding the historic elements while introducing contemporary interventions, it demonstrates the adaptability and enduring relevance of past constructions, while firmly anchoring them within today’s context and needs.