"Ingrid" Margareta Tobiasson (born February 2, 1951 in Stockholm) is a Swedish mezzo-soprano opera singer.
 Her principal roles in an extremely versatile career include the title role in Bizet's "Carmen" and "Elisabetta" in Donizetti's "Maria Stuarda".
Simone Schneider is a German operatic soprano.
 As a member of Staatstheater am Gärtnerplatz, she performed coloratura roles such as the Mozart's Queen of the Night.
 As a member of the Staatsoper Stuttgart from 2006, she has performed a wide range of leading roles including Donizetti's Maria Stuarda and the Feldmarschallin in "Der Rosenkavalier" by Richard Strauss.
 She performed as a guest in major opera houses in Germany and Europe.
Lodovico Filippo Laurenti (1693–1757) was a composer from Bologna, Italy whose family was active in Bolognese musical life.
 His father, Bartolomeo, a composer and violinist, was a founder of the "Accademia Filarmonica di Bologna".
 Lodovico's older brother Pietro Paolo, a composer as well, was also a singer and cellist who became an "Accademia" member in 1698.
 Lodovico studied violin with his father, counterpoint with his brother, and learned to play a variety of musical instruments as well.
 He replaced his brother in a local orchestra as a violist in 1712, and joined the "Accademia" in 1717.
 Lodovico composed an oratorio entitled "Maria Stuarda Regina d"Inghilterra", which received several Bolognese performances in 1718.
 In 1721, Lodovico's twelve "Sonate da camera per violoncello e basso" were published, dedicated to Sicinio Pepoli, a Count who was an amateur musician.
 The following year, 1722, Lodovico left Bologna, choosing to live in Portugal as well as travel to Spain, France, the Dutch Republic and England.
Eugenio Cavallini (16 June 1806 — 11 April 1881) was an Italian conductor, composer, violinist, and violist.
 In 1833 he became first violinist of the orchestra at La Scala, a post he held through 1855.
 He also served as a conductor at La Scala, notably leading the world premieres of Gaetano Donizetti's "Lucrezia Borgia" (1833), Donizetti's "Gemma di Vergy" (1834), Donizetti's "Maria Stuarda" (1835), Saverio Mercadante's "Il giuramento" (1837), Mercadante's "Il bravo" (1839), Giuseppe Verdi's "Oberto" (1839), Verdi's "Un giorno di regno" (1840), Donizetti's "Maria Padilla" (1841), Verdi's "Nabucco" (1842), Verdi's "I Lombardi alla prima crociata" (1843), Verdi's "Giovanna d'Arco" (1845), Federico Ricci's "Estella di Murcia" (1846), and Domenico Ronzani's "Salvator Rosa" (1854).
Nicole Chevalier is an American operatic soprano, who has appeared internationally, mostly at opera houses in Europe.
 She is a member of the Komische Oper Berlin.
 She has appeared in the title roles such as Carlisle Floyd's "Susannah", Donizetti's "Maria Stuarda" and "Lucia di Lammermoor", Verdi's "La Traviata", and Aribert Reimann's "Medea".
 In 2016, she was awarded the national theatre prize Der Faust for all four female characters in Offenbach's "Les Contes d'Hoffmann".
Amanda Louise Thane {'1': ", '2': ", '3': ", '4': "} (18 December 1953 – 1 September 2012) was an Australian operatic soprano known for her interpretations of roles such as Violetta in Verdi's "La traviata", Liù in Puccini's "Turandot", Eva in Wagner's "Die Meistersinger", and the title role in Donizetti's "Maria Stuarda".
 She sang at the Royal Opera House, Covent Garden, from 1991 to 2000, including leading roles in "Les Huguenots", "The Tales of Hoffmann" and "La bohème".
Giuseppe Bardari (27 May 1817 – 22 September 1861) was an Italian lawyer and writer.
 Although chiefly known today for having written the libretto for Donizetti's 1835 opera, "Maria Stuarda", he played a prominent role in the judiciary of Naples in the years leading up to the unification of Italy.
Mary Stuart (German: "Maria Stuart" ) is a verse play by Friedrich Schiller that depicts the last days of Mary, Queen of Scots.
 The play consists of five acts, each divided into several scenes.
 The play had its première in Weimar, Germany on 14 June 1800.
 The play formed the basis for Donizetti's opera "Maria Stuarda" (1835).
Maria Stuarda (Mary Stuart) is a tragic opera ("tragedia lirica"), in two acts, by Gaetano Donizetti, to a libretto by Giuseppe Bardari, based on Andrea Maffei's translation of Friedrich Schiller's 1800 play "Maria Stuart".
Salome, Op.
 54, is an opera in one act by Richard Strauss to a German libretto by the composer, based on Hedwig Lachmann's German translation of the French play "Salomé" by Oscar Wilde.
 Strauss dedicated the opera to his friend Sir Edgar Speyer.

Question: Are Maria Stuarda and Salome both operas?
Answer: yes