Maison Symphonique is like Dr Who's TARDIS. Bigger on the inside.
I remember when the upper right corner of Place Des Arts was a mostly empty and small plateau. There were stairs up from the street. There were amusements for kids. And then they built a large concert hall in that corner.
Blond wood everywhere, wooden seats, wooden slats in the walls, an enormous array of silver-grey organ pipes above the stage. And with acoustics perfect for singers.