“Les Messageries” project takes its name from the railroad site's past activities, whose emblematic buildings have been preserved. From the beginning of the 19^th Century up until 2015, the site was used as one of the Parisian centers for various messaging services both within the city and to surrounding regions, from the mail to the telegraph to package deliveries. The gradual discontinuation of these activities has created the opportunity of transforming what amounts to six hectares of railroad footprint into a new mixed-use neighborhood. The project area is located just near a number of recent city planning interventions that have contributed in altering significantly the Parisian landscape, including the emblematic Promenade Plantée, one of the world's first elevated park walkways.

The neighborhood will be organized around a central, unifying public space. A new topographical approach will function in opening up the site's heart, occupied by a large, raised railroad platform. Seeking to eliminate this feeling of this central platform in isolation, continual slopes of less than 4% gradient will join the site's entrances to the platform, reconnecting the whole of the site to the existing urban context.

In place of the old railroad halls, a one hectare garden stretches between the buildings to provide a seven hundred meter long pedestrian path connecting the Gare de Lyon with Boulevard de Bercy. Reserved for use by pedestrians and bicycles, this tree-lined promenade will function as the entire project's backbone around which a number of new public spaces will be created.

Organized into various plant layers presented in succession, the landscape is comprised of six different natural environments, creating a refuge of biodiversity, a new island of greenery, in the heart of the Parisian 12^th arrondissement. Leisure and recreation spaces, through which visitors can circulate or relax, are surrounded by ecological corridors that will remain inaccessible, reserved as they are for the development of flora and fauna.