The Tour Allianz One is easily recognisable on the La Défense skyline with its triangular design standing at 100 metres tall. Currently the headquarters of Allianz France, the Tour Allianz One underwent from 21012 to 2014 a full restoration and energy renovations to respond to the most demanding environmental requirements. It is outfitted with a new façade and photovoltaic panels, reducing its energy consumption by 40%. It is one of the only buildings in La Défense to have four certifications: HQE, BREEAM, LEED and BBC Effinergie Rénovation. The interior design was created by the architect Gabriela Raible and was also designed by the consortium led by the Bouygues Bâtiment Ile-de-France. As a modern and simple building, it offers redesigned work spaces that favour collaborative work, digitalisation and the cooperation of the 1,700 employees currently working in the building.