Shop interior & installation, Paris

Hermès has entrusted the RDAI agency, which is responsible for designing all the Hermès stores worldwide, with the design of a new space, singular and unexpected in Paris. Hermès is setting up shop in a swimming pool… An immense volume, empty. An impression more of space than of surface area. And now, at the end of a project that added but did not take away, the Lutétia swimming pool, in the heart of the Saint-Germain-des-Prés quarter of Paris, has metamorphosed into the first Hermès boutique on the Left Bank.

The architectural project led by Denis Montel and the teams at RDAI mixes contrasts and complementarities. It was imagined more in terms of volume than surface area, in m³ more than in m². In the end, it is an intervention both radical and astonishingly gentle.

Listed as a Historic Monument since 2005, the swimming pool built in 1935 has a strong architectonic character and a compelling identity, that of Art Deco – it is in the spirit of its age. After its closure, the swimming pool underwent varied and diverse uses and was transformed. The challenge was to translate some of the values intrinsic to Hermès into space: heritage and modernity, savoir-faire and creation.

The project has a double aim. First of all to respect, conserve and reinterpret the architecture of the swimming pool. The only important modification was the covering of the pool by means of concrete composite floor slab supported by a light structure. Underneath, the pool has been integrally preserved. The facade, giving onto the rue de Sèvres, has kept its original appearance.

Then, to tell another story, one that is resolutely contemporary. This takes form through the appearance of three monumental ash huts, which both disrupt the existing volumes and converse with them. The invasion of what was once the pool by these huts, flexible, light and nomadic, suggests the creation of houses within the house.

At the foot of an elegant apartment building from the mid-1930s, the facade of the Hermès store is discreet. An entrance portico in the centre between two windows, nothing to hint at the surprise awaiting once through the doors…

Four pavilions with an organic design, in which some will recognize familiar forms from the plant or animal world, or from childhood. Others will liken these huts, which occupy the volume of the swimming pool, to the nests of weaver birds. These pavilions of different form and dimensions are constructed in ash wood. They are self-supporting structures that rest on a system of woven wooden laths (profile 6 × 4 cm) with a double radius of curves. The documentation and three-dimensional drawing of the complex geometry of each hut was made possible by the computer script written for each one of them.

Rising to more than nine metres in height, they lean progressively, as if attracted by the skylights. The huts house the Hermès collections. They seem to have simply alighted on the ground, lending the project its nomadic dimension.

The fourth hut, which appears to be lying down, lines the staircase that naturally leads the visitor towards the pool and forms the link between the entrance and the open space of the swimming pool.

In such a volume, the lighting is crucial. The entire space is bathed in natural light that penetrates through the three large skylights above the atrium, softened only by a metal screen. At night the skylights are lit to avoid a 'black hole' effect.

The undulating walls in white plaster, running around the ground floor, are lit from above by LED tape with the light source hidden from view. Lit from the interior, the huts appear as giant lanterns. A lighting device embedded in the floor illuminates their vaults of latticed wood. Each hut has a large chandelier composed of a double ring of suspended wood. The shelving is lit by integrated and invisible LED tape.

The Lutétia swimming pool is a mineral world. The floors, the columns, the staircases are covered in mosaics, broken tiles or granito (terrazzo). The existing ornamental elements on the floor and the walls have been preserved and restored. Through the play of this transformation, this world has discovered several new forms of expression.

Adding to this refinement, the floors of rooms less visible to visitors (such as the fitting rooms, the bathrooms) have been worked in broken tiles. It is a means of writing these new spaces into the history of the swimming pool. The surface of the pool is adorned with a mosaic covering, whose texture and composition of ceramic and glass mosaic tiles evoke the movement of waves. Shiny and matt tesserae in different dimensions and in multiple colours and white gold seem to vibrate as one moves around. A random approach to the composition in graduated tones creates effects of depth and sparkle accentuated by the play of light.