Who was the architect of the opera house where Thaïs was first performed?
Palais Garnier The Palais Garnier (] French    ) is a 1,979-seat opera house, which was built from 1861 to 1875 for the Paris Opera. It was called the Salle des Capucines, because of its location on the Boulevard des Capucines in the 9th arrondissement of Paris, but soon became known as the Palais Garnier, in recognition of its opulence and its architect, Charles Garnier. The theatre is also often referred to as the Opéra Garnier (French    ) and historically was known as the Opéra de Paris or simply the Opéra, as it was the primary home of the Paris Opera and its associated Paris Opera Ballet until 1989, when the Opéra Bastille opened at the Place de la Bastille. The Paris Opera now mainly uses the Palais Garnier for ballet.
Tivoli Theatre of Varieties The Tivoli Theatre of Varieties was a popular English theatre based in the Strand, West London. It was designed by Charles Phipps and was built during 1889–90 at a cost of £300,000. It was constructed on the former site of the Tivoli Beer Garden and Restaurant. In the consortium that financed the project was the actor Edward O'Connor Terry. The hall opened on 24 May 1890 and was located opposite the Adelphi Theatre.