(From L) Japanese architect Shigeru Ban, Boulogne-Billancourt's Mayor Jean-Christophe Baguet, artistic director of the Insula Orchestra Laurence Equilbey, director of the Theatre du Chatelet Jean-Luc Choplin, Issy les Moulineaux's Mayor Andre Santini and Head of the Hauts-de-Seine general council Patrick Devedjian pose during the presentation of the Cite Musicale de l'Ile Seguin in Boulogne Billancourt on September 21, 2016. The new Musical City at Ile Seguin in Boulogne-Billancourt, a Western suburb of Paris, will open in spring 2017. The 170 million euros project, designed by Shigeru Ban and Jean de Gastines will contain a concert hall, an auditorium, rehearsal studios, a music school and shops. / AFP PHOTO / PATRICK KOVARIKPATRICK KOVARIK/AFP/Getty Images

Tempo Ile Seguin's president Thierry Roulet speaks during the presentation of the Cite Musicale de l'Ile Seguin in Boulogne Billancourt on September 21, 2016. The new Musical City at Ile Seguin in Boulogne-Billancourt, a Western suburb of Paris, will open in spring 2017. The 170 million euros project, designed by Shigeru Ban and Jean de Gastines will contain a concert hall, an auditorium, rehearsal studios, a music school and shops. / AFP PHOTO / PATRICK KOVARIKPATRICK KOVARIK/AFP/Getty Images

Head of the Hauts-de-Seine general council Patrick Devedjian speaks during the presentation of the Cite Musicale de l'Ile Seguin in Boulogne Billancourt on September 21, 2016. The new Musical City at Ile Seguin in Boulogne-Billancourt, a Western suburb of Paris, will open in spring 2017. The 170 million euros project, designed by Shigeru Ban and Jean de Gastines will contain a concert hall, an auditorium, rehearsal studios, a music school and shops. / AFP PHOTO / PATRICK KOVARIKPATRICK KOVARIK/AFP/Getty Images

Head of the Hauts-de-Seine general council Patrick Devedjian attends the presentation of the Cite Musicale de l'Ile Seguin in Boulogne Billancourt on September 21, 2016. The new Musical City at Ile Seguin in Boulogne-Billancourt, a Western suburb of Paris, will open in spring 2017. The 170 million euros project, designed by Shigeru Ban and Jean de Gastines will contain a concert hall, an auditorium, rehearsal studios, a music school and shops. / AFP PHOTO / PATRICK KOVARIKPATRICK KOVARIK/AFP/Getty Images

Japanese architect Shigeru Ban speaks during a press conference for the presentation of the Cite Musicale de l'Ile Seguin in Boulogne Billancourt on September 21, 2016. The new Musical City at Ile Seguin in Boulogne-Billancourt, a Western suburb of Paris, will open in spring 2017. The 170 million euros project, designed by Shigeru Ban and Jean de Gastines will contain a concert hall, an auditorium, rehearsal studios, a music school and shops. / AFP PHOTO / PATRICK KOVARIKPATRICK KOVARIK/AFP/Getty Images

Issy les Moulineaux's Mayor Andre Santini (L), Japanese architect Shigeru Ban (C), French architect Jean de Gastines attend the presentation of the Cite Musicale de l'Ile Seguin in Boulogne Billancourt on September 21, 2016. The new Musical City at Ile Seguin in Boulogne-Billancourt, a Western suburb of Paris, will open in spring 2017. The 170 million euros project, designed by Shigeru Ban and Jean de Gastines will contain a concert hall, an auditorium, rehearsal studios, a music school and shops. / AFP PHOTO / PATRICK KOVARIKPATRICK KOVARIK/AFP/Getty Images

Boulogne-Billancourt's mayor Jean-Christophe Baguet (L) and head of the Hauts-de-Seine general council Patrick Devedjian attend the presentation of the Cite Musicale de l'Ile Seguin in Boulogne Billancourt on September 21, 2016. The new Musical City at Ile Seguin in Boulogne-Billancourt, a Western suburb of Paris, will open in spring 2017. The 170 million euros project, designed by Shigeru Ban and Jean de Gastines will contain a concert hall, an auditorium, rehearsal studios, a music school and shops. / AFP PHOTO / PATRICK KOVARIKPATRICK KOVARIK/AFP/Getty Images

Japanese architect Shigeru Ban speaks during a press conference for the presentation of the Cite Musicale de l'Ile Seguin in Boulogne Billancourt on September 21, 2016. The new Musical City at Ile Seguin in Boulogne-Billancourt, a Western suburb of Paris, will open in spring 2017. The 170 million euros project, designed by Shigeru Ban and Jean de Gastines will contain a concert hall, an auditorium, rehearsal studios, a music school and shops. / AFP PHOTO / PATRICK KOVARIKPATRICK KOVARIK/AFP/Getty Images