Question: What Russian city are both Mariinsky Ballet and Arthur Saint-Léon located?

Context paragraphs:
Louis Mérante: Louis Alexandre Mérante (23 July 1828–Courbevoie, 17 July 1887) was a dancer and choreographer, the "Maître de Ballet" (First Balletmaster/Chief Choreographer) of the Paris Opera Ballet at the Salle Le Peletier until its destruction by fire in 1873, and subsequently the first Ballet Master at the company's new Palais Garnier, which opened in 1875.  He is best remembered as the choreographer of Léo Delibes' "Sylvia, ou la nymphe de Diane" (1876).  With Arthur Saint-Léon and Jules Perrot, he is one of the three choreographers who defined the French ballet tradition during the Second French Empire and the Third Republic according to choreographer .

Larissa Lezhnina: Larisa Lezhnina (Russian: Лариса Лежнина ) is a principal dancer with Dutch National Ballet, Amsterdam.  She was born on March 17, 1969 in Leningrad (now St. Petersburg), Russia.  She graduated from the Vaganova Ballet Academy in Leningrad in 1987 and joined the Kirov Ballet (now the Mariinsky Ballet).  In 1990 she became a First Soloist.  She left the Mariinsky in 1994 and joined the Dutch National Ballet as a principal.

Mariinsky Theatre: The Mariinsky Theatre (Russian: Мариинский театр , Mariinskiy Teatr, also spelled Maryinsky or Mariyinsky) is a historic theatre of opera and ballet in Saint Petersburg, Russia.  Opened in 1860, it became the preeminent music theatre of late 19th century Russia, where many of the stage masterpieces of Tchaikovsky, Mussorgsky, and Rimsky-Korsakov received their premieres.  Through most of the Soviet era, it was known as the Kirov Theatre.  Today, the Mariinsky Theatre is home to the Mariinsky Ballet, Mariinsky Opera and Mariinsky Orchestra.  Since Yuri Temirkanov's retirement in 1988, the conductor Valery Gergiev has served as the theatre's general director.

Cesare Pugni: Cesare Pugni (Russian: Цезарь Пуни ) (] ; 31 May 1802–26 January [O.S. 14 January] 1870 ) born in Genoa, was an Italian composer of ballet music, a pianist and a violinist.  In his early career he composed operas, symphonies, and various other forms of orchestral music.  Pugni is most noted for the ballets he composed for Her Majesty's Theatre in London (1843–1850), and for the Imperial Theatres in St. Petersburg, Russia (1850–1870).  The majority of his ballet music was composed for the works of the ballet master Jules Perrot, who mounted nearly every one of his ballets to scores by Pugni.  In 1850 Perrot departed London for Russia, having accepted the position of "Premier maître de ballet" of the St. Petersburg Imperial Theatres at the behest of Carlotta Grisi, who was engaged as "Prima ballerina".  Cesare Pugni followed Perrot and Grisi to Russia, and remained in the imperial capital even after Grisi's departure in 1853 and Perrot's departure in 1858.  Pugni went on the compose for Perrot's successors Arthur Saint-Léon and Marius Petipa, serving as the Imperial Theatre's official composer of ballet music until his death in 1870.

Oksana Skorik: Oksana Skorik (Russian: Оксана Скорик) (born April 20, 1989) is a Ukrainian professional ballet dancer and Principal Dancer of the Mariinsky Ballet.  She graduated from Perm School of Dance in 2007 and joined the Mariinsky Ballet the same year.  She was the subject of David Kinsella's documentary "A Beautiful Tragedy" and was featured on RT Documentary's "Ballet, Sweat and Tears".

Igor Kolb: Igor Kolb (born June 6, 1977 in Pinsk, Belarus) is a principal dancer of Mariinsky Ballet.  He graduated Byelorussia State Ballet School, and joined Mariinsky ballet in 1996.  He became a soloist in 1998, and promoted to principal dancer in 2003.

Mariinsky Ballet: The Mariinsky Ballet is the resident classical ballet company of the Mariinsky Theatre in Saint Petersburg, Russia.  Founded in the 18th century and originally known as the Imperial Russian Ballet, the Mariinsky Ballet is one of the world's leading ballet companies.  Internationally, the Mariinsky Ballet continues to be known by its former Soviet name the Kirov Ballet.  The Mariinsky Ballet is the parent company of the "Vaganova Ballet Academy", a leading international ballet school.

Romantic ballet: The Romantic ballet is defined primarily by an era in ballet in which the ideas of Romanticism in art and literature influenced the creation of ballets.  The era occurred during the early to mid 19th century primarily at the Théâtre de l'Académie Royale de Musique of the Paris Opera Ballet and Her Majesty's Theatre in London.  It is typically considered to have begun with the 1827 début in Paris of the ballerina Marie Taglioni in the ballet "La Sylphide", and to have reached its zenith with the premiere of the divertissement "Pas de Quatre" staged by the Ballet Master Jules Perrot in London in 1845.  The Romantic ballet had no immediate end, but rather a slow decline.  Arthur Saint-Léon's 1870 ballet "Coppélia" is considered to be the last work of the Romantic Ballet.

Fiametta: Fiametta or Fiammetta, (also known as "The Flame of Love", "The Salamander" or "Néméa") is a ballet in four acts and four scenes, choreographed by Arthur Saint-Léon to music by Ludwig Minkus, first presented by the Ballet of the Moscow Imperial Bolshoi Theatre on November 12–24, 1863 (Julian/Gregorian calendar dates) at the Moscow Imperial Bolshoi Theatre, Moscow, Russia, with Anna Sobeshchanskaya as Fiametta.

Arthur Saint-Léon: Arthur Saint-Léon (17 September 1821, Paris – 2 September 1870) was the "Maître de Ballet" of St. Petersburg Imperial Ballet from 1859 until 1869 and is famous for creating the choreography of the ballet "Coppélia".

Supporting paragraphs: Arthur Saint-Léon Mariinsky Ballet
Answer: Saint Petersburg