In the context of a revitalization of La Défense, PCA-STREAM has imagined a complex form that grows through morphogenesis. La Défense, Europe's leading business district, needed a new lease on life to remain competitive with international markets. The obsolescent nature of its property holdings and the ageing character of its concrete based urban planning, sterile and closed in on itself, pushed the government in 2006 to launch a plan to accelerate and amplify the actions engaged by the EPAD. Architectural audacity was required in replacing the most obsolete of the towers, along with the objective or harmoniously reinforcing the connections with the neighbouring communes. The objective is to restore a strong image to La Défense, an image of innovation that is in phase with contemporary environmental issues.