At the “prow” of the island of Seguin, the Cité Musicale solves the paradox of remaining in perfect continuity with the urban planning project of Jean Nouvel, while at the same time constituting a signal, an emblem of the culture of Hauts-de-Seine. On the downstream end, the foundation is inclined, and allows a nest of woven wood with rounded shapes to emerge. This detaches itself from the general silhouette of the island and affirms its presence. It announces the specificity of a prestigious public and cultural program: at the interior one notices the iridescent hull of the auditorium and the activity of its foyers. To the sides, a silver sail protects it from direct sunlight. This photovoltaic solar sail is always in movement, orienting itself following the course of the sun and permitting optimal energy production.