Question: Who was the architect of the opera house where Thaïs was first performed?

 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 Palais Garnier (] French    ) is a 1,979-seat opera house, which was built from 1861 to 1875 for the Paris Opera.  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. <SEP> Royal Opera House, also known as Opera House in Mumbai (formerly Bombay), is India's only surviving opera house.  Situated on Charni Road, near Girgaum Chowpatti beach, the adjective ‘Royal’ was prefixed to ‘Opera House’ to reflect the fact that its foundation stone was laid during the British Raj in 1909, and King George V inaugurated the building in 1911 while the building was still under construction.  Work on the Royal Opera House was completed in 1912, although additions were made to the building up to 1915.  After years of neglect following its closure in 1993, restoration work started in 2008.  The exterior restoration was completed in 2011 and restoration was completed in 2016.  The area around the theatre is also referred to as the Opera House in Mumbai.The Opera House area has many jewellery, metal and IT companies.  On 21 October 2016, after a gap of 23 years, Royal Opera House hosted performance of Bombay-born British soprano Patricia Rozario and her husband, pianist Mark Troop.  The private event was organised by Opera House owners Maharaja Joytendrasinhji Jadeja and Maharani Kumud Kumari Jadeja of Gondal, Gujarat. <SEP> Claremont City Hall, also known as the Claremont Opera House, is located at 58 Opera House Square in the heart of Claremont, New Hampshire, United States.  The monumental Italian Renaissance Revival two-story brick and brownstone building was designed by New York City architect Charles A. Rich, an alumnus of nearby Dartmouth College, and built between 1895 and 1897.  Hira R. Beckwith, an architect in Claremont, was the contractor.  Many of the construction materials for the building came from the surrounding region.  The foundation consists of Green Mountain rock, and the base was dressed Connecticut River brownstone from Springfield, Massachusetts.  The major part of the exterior is built from nearly one million bricks from Lebanon, New Hampshire.  The original design of the building included first floor that housed a meeting space seating 700, while the upper floor housed the "opera house" (auditorium), which seated nearly 1,000 and included a stage adequate for mounting theatrical productions.  Rich and Beckwith spent two years and $62,000 to construct the building as a regional center for entertainment, cultural, community and political events.  The building was dedicated on June 22, 1897. <SEP> Thaïs (] ) is an opera, a "comédie lyrique" in three acts and seven tableaux, by Jules Massenet to a French libretto by Louis Gallet, based on the novel "Thaïs" by Anatole France.  The original production was directed by Alexandre Lapissida, with costumes designed by Charles Bianchini and sets by Marcel Jambon (act 1, scene 1; act 3) and Eugène Carpezat (act 1, scene 2; act 2).  It was first performed at the Opéra Garnier in Paris on 16 March 1894, starring the American soprano Sibyl Sanderson, for whom Massenet had written the title role.  The opera was later revised by the composer and was premiered at the same opera house on 13 April 1898.