The Trinity Tower is France's first “high-rise bridge.” The project, delivered in 2020, is a technical feat: the building complex spans the seven lanes of Avenue de la Division Leclerc, including the access ramp to the La Défense tunnel (A14). In addition to creating new public spaces and modernizing the intersection, it provides a new connection to the slab.

Thanks to its off-center core, which shifts the elevators to the façade in a transparent manner, it interacts with its environment and reveals its activity through bioclimatic and kinetic façades that optimize light intake and terraces that punctuate the floors with trees planted in the ground. Trinity aims to place the building's architecture at the service of these new ways of working: completely open-plan spaces, terraces planted with trees and loggias, hybrid spaces, restaurants, rooftop business centers, and more.

The tower's 52,600 m² are divided as follows:

• 49,000 m² of office space
• 500 m² of retail space
• 3,500 m² of green space

The tower meets international environmental standards: it has been awarded both HQE “Exceptional” and BREEAM “Excellent” certifications.

Today, around ten companies from a variety of sectors benefit from the tower's cutting-edge services: Sopra Steria (consulting firm), Afflelou (optics), Technip (energy engineering and construction), Welkin & Meraki (co-working spaces), Altitude (networks), Santarelli (consulting firm), Viatris (pharmaceutical industry), etc.

Cro&Co Architecture is an agency founded by Jean-Luc Crochon. The agency was chosen to lead this project because it places user well-being at the heart of its approach.

Jean-Luc Crochon has won several awards in the field (2021 Construction Awards, 2022 and 2001 CTBUH Awards, 2020 Eiffel Awards, 2020 Siati Award, 2010 Steel Award, 2002 AMO Award) and stands out in the business district landscape.

Cro&Co has numerous office, housing, and public facility projects to its credit. In Paris La Défense, the agency has a portfolio of technical and structuring projects for the area:

• Restructuring of the CNIT (2010)
• Major restructuring of the Carré Michelet (2019)
• Creation of interfaces for the Éole station through the CNIT (delivery forthcoming)
• Reconstruction of the Odyssey tower (planned), with a consortium of international architects such as Jeanne Gang.