In Paris in the 1890s, the Palais Garnier opera house is believed to be haunted by an entity known as the Phantom of the Opera, or simply the Opera Ghost. A stagehand named Joseph Buquet is found hanged and the rope around his neck goes missing. At a gala performance for the retirement of the opera house's two managers, a young little-known Swedish soprano, Christine Daae, is called upon to sing in the place of the Opera's leading soprano, Carlotta, who is ill, and her performance is an astonishing success. The Vicomte Raoul de Chagny, who was present at the performance, recognises her as his childhood playmate, and recalls his love for her. He attempts to visit her backstage, where he hears a man complimenting her from inside her dressing room. He investigates the room once Christine leaves, only to find it empty.

Answer this question based on the passage: when did phantom of the opera take place? OK. Let's think. My stream of consciousness:
To answer the above question, the relevant sentence is: In Paris in the 1890s, the Palais Garnier opera house is believed to be haunted by an entity known as the Phantom of the Opera, or simply the Opera Ghost. The answer is in the 1890s.