Renzo Piano Building Workshop (RPBW) has unveiled an ambitious proposal for the Montparnasse Commercial Centre in Paris, envisioning a comprehensive urban transformation. The project seeks to convert the previously isolated 1970s retail complex into an accessible, pedestrian-focused urban district. This initiative, developed in conjunction with the ongoing revitalization of the Montparnasse Tower by Nouvelle AOM, aims to fundamentally alter a historically contentious urban site, shifting it from an inward-looking structure to a permeable area integrated into daily Parisian life, emphasizing movement and public space.
The central objective of RPBW's design is to reintegrate the site with the broader Parisian urban fabric. This involves creating new pedestrian thoroughfares that will connect Rue de Rennes, Montparnasse station, and adjacent streets across three distinct arrondissements. The ground-level areas of the complex are designed to be transparent and inviting, ensuring visual and physical continuity throughout the space. A significant feature of this plan is the introduction of a large, landscaped public square. This piazza is conceived as a serene civic space, protected from traffic and shaded, intended to foster everyday social interactions rather than serve as a grand, monumental gesture. It will host various activities, including cafes, outdoor seating, cultural events, and sports facilities, transforming it into a communal hub for the local neighborhood.
The Ensemble Immobilier Tour Maine-Montparnasse, originally constructed between 1969 and 1973 by AOM, encompasses the tower, commercial center, and the CIT Tower, all situated on the former Montparnasse train station grounds. Its initial design reflected an era of slab-based urban planning, prioritizing separation, elevation, and internal circulation. Over time, this approach led to a disconnected environment, estranged from its neighboring areas. RPBW's plan directly addresses these issues by reimagining the commercial center as a contemporary Parisian block. This involves restoring street-level connectivity, re-establishing public life that was previously marginalized, and integrating diverse programmatic elements. New constructions will be scaled to complement the existing urban context, promoting the perception of a cohesive block rather than an imposing megastructure.
The architectural scheme incorporates a diverse mix of uses, including cultural venues, residential units, commercial spaces, and sports facilities, notably student housing and local retail options. This programmatic variety is intended to support a localized daily life and extend activity beyond traditional retail hours, fostering a more inclusive and walkable urban environment. The architecture itself acts as a framework for interaction, mobility, and coexistence, aligning with broader trends in Paris's approach to major inner-city redevelopment projects. A key principle guiding RPBW's intervention is structural and environmental reuse. The existing structural grid will be preserved as the foundational element, significantly reducing material consumption and embodied carbon. Where new volumes are necessary, they will feature lightweight timber constructions, allowing for the integration of additional programs with minimal structural impact. This strategy of conservation, transformation, and selective demolition underscores a design philosophy that values the inherited urban fabric as a vital resource.
The project, initially commissioned in 2022, faced a temporary halt in 2023 due to discussions surrounding amendments to Paris's Land Use Plan. Design work recommenced in 2025, with subsequent deliberations aligning planning, environmental, and client objectives into a unified vision for both the commercial center and the CIT Tower. In late 2025, the Council of Paris unanimously approved the project, followed by the signing of a protocol agreement between the City of Paris and the EITMM in January 2026, paving the way for this significant urban renewal.