The Palais Garnier is famously known as the backdrop for The Phantom of the Opera, and its grandeur is evident both inside and out. Visitors are often struck by the lavish details, from gilded decorations to sweeping staircases.
Since the Opera Bastille opened in the 12th arrondissement in 1989, the Palais Garnier has shifted its focus. Today, it is primarily used for dance performances, with ballet taking center stage in this historic venue.
Source - https://en.wikipedia.org/wiki/Palais_Garnier