We confronted an exceptional edifice: the Tour la Villette, known by multiple names, Tour Daewoo, Tour Périphérique, Tour Pariferic, Tour Olympe, which alone testifies to several successive urban lives. This 96-meter structure, the second tallest skyscraper in Seine-Saint-Denis, occupies a remarkable geographical position at the entrance to Aubervilliers, exactly at the boundary between Paris's 19th arrondissement and the boulevard Périphérique. Its imposing verticality makes it a landmark visible from numerous points across the metropolis. This strategic situation, both constraint and opportunity, led us to envision not demolition, a destructive gesture too often favored, but a **radical transformation** that honors the building's history while fully inscribing it within contemporary issues.

The urban context of Aubervilliers is undergoing profound mutation. The commune finds itself at the heart of intense metropolitan dynamics, driven by the arrival of the Grand Paris Express and by a political will to reinvent the fringes between Paris and its suburbs. The boulevard Périphérique, long perceived as a rupture, is gradually becoming a territory of suture. Our project for the Tour Grand Angle inscribes itself in this logic of **urban repair**. Rather than erasing an architectural past, we chose to reactivate it, to give it new relevance. The existing tower, built in the 1970s according to a monofunctional office logic, carried within it considerable potential for evolution. Its column-slab structure offered programmatic freedom that we fully exploited.

The mixed program we propose constitutes the heart of our approach. We conceived an **intelligent programmatic stacking** that creates synergies between uses: housing, offices, student residence, hotel, and restaurant compose a vertical ecosystem where each function dialogues with the others. This mixture is not simply functional, it is social and temporal. Students, workers, permanent residents, transient visitors cross paths in shared spaces that become the project's true living places. The restaurant on the upper level, notably, offers a panoramic view of the metropolis and constitutes an amenity accessible to all the tower's occupants. This **programmatic diversity** radically transforms the image and use of a building once monofunctional and closed in on itself.

Our architectural intervention articulates around three major gestures. First, a **new envelope** that dresses the existing structure without denaturing it. We designed a contemporary skin, composed of prefabricated modules integrating insulation, windows, and solar protections. This high-performance envelope responds to current environmental requirements while creating a new visual identity for the building. Next, we reorganized the interior floor plates to create space typologies adapted to each use, with particular attention paid to vertical circulation and transition spaces. Finally, we worked on the tower's base, that critical moment where the building meets the ground and the city. By creating transparencies, ground-floor shops, and multiple accesses according to functions, we opened the tower to its immediate urban environment.

The question of **materiality** was central to our reflection. Transforming a 1970s tower requires composing with the existing while affirming a clear contemporaneity. We opted for an architecture of layers, where the new skin dialogues with the preserved concrete structure. The facade modules, fabricated in the workshop then assembled on site, allow rapid implementation and controlled finish quality. Their design integrates variations according to orientations and programs, creating a rich architectural texture that reveals the project's functional complexity. The solar protections, genuine elements of thermal comfort, also participate in the overall composition and create plays of shadow and light that animate the facades.

Our environmental approach rests on a fundamental principle: **rehabilitate rather than demolish**. Preserving the existing structure avoids the emission of considerable quantities of CO2 linked to demolition and reconstruction. It is a radical gesture of sobriety that imposes itself in the face of climate emergency. Beyond this structural choice, we worked on the building's overall energy performance through reinforced insulation, natural ventilation systems, and fine management of solar gains according to orientations. The roof was transformed into a productive surface, accommodating photovoltaic panels and vegetated spaces. This environmental approach is not limited to technical devices: it informs the entire project, from the choice of materials to the design of exterior spaces at the tower's base.

The Tour Grand Angle thus becomes an **urban laboratory** where new forms of inhabiting verticality in the Parisian suburbs are tested. It affirms that a building is never fixed, that architecture is by nature transformable, adaptable to evolutions in lifestyles and ecological imperatives. By giving new life to this iconic structure, we propose an alternative model to the demolition-reconstruction cycle that consumes our resources. This project testifies to our conviction that architecture must know how to compose with its heritage, reinterpret it without nostalgia, and project toward the future pertinent solutions for territories undergoing profound mutation.