Construction on the Hekla Tower began in May of 2018 after receiving the permit to build in June 2016. The tower designed by French architect Jean Nouvel is said to be completed in early 2022. The tower is designed to be 220 meters-high and located in the business district of La, Defense. One of the main aspects of the tower is that it will majorly alter the skyline of La Defense; the tower is said to bring a new sense of equilibrium and offer impeccable views. Nouvel says the tower is heavily influenced by the Rose de Cherbourg construction project. The tower is a collaboration between Nouvel and AG Real Estate and Hines, which primarly focuses on the construction of large head offices. The idea for the tower was for it to be a prismatic composition made of glass an metal, to have a mass effect of brightness, shade, and transparency. The purpose of the tower was to create work and convivial sapces, while also included an amphitheater, perfromance halls, bars, resturants, and gyms.

An impressive 76,000 square feet, Nouvel also focused on the aspect of sustainability when designing this project. As the tower is built based on a system of triangular panels, the top-end of the tower is occupied by a roof garden that will then by shaded by the triangular panels and given room for natural growth. The tower meets multiple requirement of the LEED, HQE, and BREEAM environmental certificates. The skyscraper was also designed to incorporate TWIN elevators in order to improve energy efficiency, free up floor space, and increase transportation capacity. The TWIN elevators are meant to go above the high standards of the tower as sustainability is seen as one of the main priorities in the project. By 2022 the project is set to be complete and be a main site to see in La Defense.