Tour T1
Engie headquarters

This new shape, which looks different depending on the direction of view, ensures the tower’s integration into a complex urban setting and constitutes a landmark.

Viewed from the south, it looks like a vertical prow that is well integrated with La Défense’s array of tall towers. Viewed from the east or west, it looks like an immense veil whose gradual curve and asymmetric silhouette provide a transition from the lower town. Viewed from the north, it is a tall, curved ladder storming the sky, the curve of its façade making it disappear.

T1 also presents itself as an urban tower whose shape contributes to the character of a new district. Marking to the south the corner between the street and boulevard with which the façades are aligned, to the north it borders a new circular plaza centred on the main axis of its plan. At street level in the town of Courbevoie, it enjoys a real postal address.

The tower’s horseshoe-shaped geometry provides each level with vast panoramic storeys. Its design combines quality of working conditions with functional effectiveness and high-performance facilities.

The tower is oriented north-south, and the large, curved, screen printed glass leaf faces the path of the sun, with the screen printing reducing sunlight infiltration. The heavy insulation and limited span of the façades reduce heat loss. Every architectural and technical choice contributes to the quality of the building’s relationship with its environment, good energy management, choice of construction products, and residents’ comfort and health.

It is thus the first tower of La Défense’s new sustainable generation whose architectural form is strongly differentiated from the preceding generations of towers.