The Opéra Garnier dominates its namesake plaza. Its columns, sculptures, and gilding are world-famous, and the Italian-style theatre inspired architects from the world over. It is the setting for numerous artists and shows, from dance and song to music, theatre, and more.

The creation of the Opéra Garnier became part of Napoleon III's large-scale urbanism project in 1858. A special entrance was set aside to protect him from attacks, and the structure shows all of the social hierarchy from the time, including the Rotonde des Abonnés (Subscribers' Vestibule), the salons, boxes, and balconies. In 1964, painter Marc Chagall painted a ceiling of colours and light over the theatre's 220 m² area.

Temporary exhibits present visitors with the great works of architecture, decoration, music, and choreography created within the walls of the Palais Garnier. The arts of the table are also present there, with 2 Michelin stars. The outside terrace offers a beautiful view of the building.