|Antenna spire||185 m (607 ft)|
|Roof||169 m (554 ft)|
|Floor area||70,000 m2 (750,000 sq ft)|
|Design and construction|
|Architect||Valode & Pistre Architects|
Construction began in 2005 and the tower was completed and opened in 2008. The tower, 185 m (607 ft) tall, is the third-tallest skyscraper in La Défense after the Tour Total (190m) and Tour First (231m). Since 2010, the entirety of the building's office space has been rented by GDF Suez.
- (in French) Official site
- "Tour T1". Skyscraper Center. CTBUH. Retrieved 11 October 2017.