Tour Descartes – Revolvy

Tour Eqho (also known as Tour IBM , and Tour Descartes ) is an office skyscraper located in La Défense business district situated west of Paris , France . Built in 1988, the tower, with a height of 130 meters, belongs to the third generation of towers in La Défense. The tower takes the shape of a parallelepiped in which a semi-cylinder would have been extruded on the main façade.