A filter wall will be constructed on the exact boundaries of the site, diffusing the alienating physical and mental states created by the Boulevard Massena. This filter will be composed of hanging gardens, thickest at the bottom where the pollution and noise is concentrated. Increasingly diffuse as it climbs higher, the wall fades as it rises. Modular homes are inserted into this vertical filter. Certain sections are left open to direct view corridors. These homes are hung on the wall in a gridded skeleton, allowing for completely modular building, visually and structurally. The wall is constructed first, without the homes. Connected sections of the grid are bought by families, creating unique compositions out of these modular units. It is the gridded urban ground plane turned on it's side, rendered vertical. Growing from beneath the filter wall of homes is a new urban/rural landscape. Small scale commercial venues punctuate this landscape, cutting in and out of the topography, supporting the residents above. The North-South access points direct the air flow off of the Seine and into the site. The project is visibile from the city of Paris, presenting an architectural reminder of the division it on which it rests. Its porous physicality is unlike any other structure. Its nature counters any separation between public and private, city and home. The filter is not a wall but a living memory of its history, and a solution for its present.