Question: Lutz-Michael Harder, is a German lyric tenor known mostly for his interpretation of opera roles of Wolfgang Amadeus Mozart, baptised as Johannes Chrysostomus Wolfgangus Theophilus Mozart, was a prolific and influential composer, of which time period?

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Franz Xaver Wolfgang Mozart: Franz Xaver Wolfgang Mozart (26 July 1791 – 29 July 1844), also known as Wolfgang Amadeus Mozart, Jr., was the youngest child of six born to Wolfgang Amadeus Mozart and his wife Constanze.  He was the younger of his parents' two surviving children.  He was a composer, pianist, conductor, and teacher from the late classical period whose musical style was of an early Romanticism, heavily influenced by his father's mature style.

John Mark Ainsley: John Mark Ainsley (born 9 July 1963) is an English lyric tenor.  Known for his supple voice, Ainsley is particularly admired for his interpretations of baroque music and the works of Wolfgang Amadeus Mozart.  In the course of his career, he has gravitated towards 20th-century music, singing in operas by Henze, Janáček, and Britten.

Lutz-Michael Harder: Lutz-Michael Harder (born 1951, Langenfeld/Długoszyn near Küstrin) is a German lyric tenor known mostly for his interpretation of Mozart opera roles and as a baroque concert soloist.

Jean Périer: Jean (Alexis) Périer (2 February 1869 – 3 November 1954) was a French operatic baryton-martin and actor.  Although he sang principally within the operetta repertoire, Périer did portray a number of opera roles; mostly within operas by Wolfgang Amadeus Mozart and Giacomo Puccini.  His career was almost entirely centered in Paris and he had a long association with the Opéra-Comique.  He sang in a large number of world premieres, most notably originating the role of Pelléas in Claude Debussy's "Pelléas et Mélisande" in 1902.  In addition to his opera career, Périer appeared in several films between 1900 and 1938.

Köchel catalogue: "This is a mostly complete list of the works of Wolfgang Amadeus Mozart, according to the sixth edition of the Köchel catalogue.  For a selective list of his works, grouped by genre, see List of compositions by Wolfgang Amadeus Mozart".

Amadeus (film): Amadeus is a 1984 American period drama film directed by Miloš Forman, adapted by Peter Shaffer from his stage play "Amadeus".  The story, set in Vienna, Austria, during the latter half of the 18th century, is a fictionalized biography of Wolfgang Amadeus Mozart.  Mozart's music is heard extensively in the soundtrack of the movie.  The film follows Italian composer Antonio Salieri at the court of Emperor Joseph II, and his jealous vendetta against his younger rival, Wolfgang Amadeus Mozart.

Neue Mozart-Ausgabe: The Neue Mozart-Ausgabe (abbreviated as "NMA"; in English, "New Mozart Edition") is the second complete works edition of the music of Wolfgang Amadeus Mozart.  A longer and more formal title for the edition is "Wolfgang Amadeus Mozart.  Neue Ausgabe sämtlicher Werke."

Wolfgang Amadeus Mozart: Wolfgang Amadeus Mozart ( ; ; ] ; 27 January 1756 – 5 December 1791), baptised as Johannes Chrysostomus Wolfgangus Theophilus Mozart, was a prolific and influential composer of the Classical era.

Josef Mysliveček: Josef Mysliveček (9 March 1737 – 4 February 1781) was a Czech composer who contributed to the formation of late eighteenth-century classicism in music.  Mysliveček provided his younger friend Wolfgang Amadeus Mozart with significant compositional models in the genres of symphony, Italian serious opera, and violin concerto; both Wolfgang and his father Leopold Mozart considered him an intimate friend from the time of their first meetings in Bologna in 1770 until he betrayed their trust over the promise of an operatic commission for Wolfgang to be arranged with the management of the Teatro San Carlo in Naples.  He was close to the Mozart family, and there are frequent references to him in the Mozart correspondence.

Vincenzo Calvesi: Vincenzo Calvesi (fl.  1777–1811) was an Italian operatic tenor and impresario.  A skillful lyric tenor, he began his career performing in opera houses in Italy during the 1770s.  He was active in Dresden in 1782 to 1783 and then spent most of his time performing in Vienna from 1785 to 1794.  He is best remembered today for creating the role of Ferrando in the world premiere of Wolfgang Amadeus Mozart's "Così fan tutte" in 1790.  That same year the Viennese publication "Grundsätze zur Theaterkritik" described him as "one of the best tenors from Italy…with a voice naturally sweet, pleasant and sonorous."  He was later active in Rome as an impresario up until 1811.

Supporting paragraphs: Lutz-Michael Harder Wolfgang Amadeus Mozart
Answer: Classical era