Question: Demofoonte was an opera by the composer who was part of what period?
Context: Demofoonte is an opera in three acts by the Czech composer Josef Mysliveček.  It was the composer's second setting of this popular libretto by Metastasio first produced in 1733 (it was common in the second half of the eighteenth century for composers to set Metastasian texts dozens of times over).  It was typical for subsequent setting of Metastasian dramas to incorporate significant alterations, and this setting retains the augmentation of the role of Timante that is found in the composer's first setting of this text.  All of Mysliveček's operas are of the serious type in Italian referred to as opera seria. Taverner is an opera with music and libretto by Peter Maxwell Davies.  It is based on the life of the 16th-century English composer John Taverner, but in what Davies himself acknowledged was a non-realistic treatment.  The gestation for the opera dated as far back as 1956 during Davies's years in Manchester, and continued when he went to Princeton University in 1962.  Davies produced several instrumental works related to the opera during this gestation period, including the "Points and Dances from 'Taverner and the "Second Fantasia on John Taverner's "In Nomine"".  Davies had completed the opera in 1968, but lost parts of the score in a fire at his Dorset cottage in 1969, which necessitated recomposition. The First Emperor is an opera in two acts with music by Tan Dun and a libretto written in English by Tan Dun and Ha Jin.  The opera received its world premiere at the Metropolitan Opera at Lincoln Center in New York City on 21 December 2006, conducted by the composer with Plácido Domingo in the title role.  It was broadcast live to hundreds of cinemas around the world on 13 January 2007 as part of the Met Live in HD season.  The following year, EMI released this movie broadcast on DVD.  The opera was a co-production between the Metropolitan Opera and the Los Angeles Opera and was described to be the most elaborate Metropolitan opera production since "War and Peace". Demofoonte is an opera in three acts by the Czech composer Josef Mysliveček.  It was the composer's first setting of this popular libretto by Metastasio first produced in 1733 (it was common in the second half of the eighteenth century for composers to set Metastasian texts two or more times over).  This setting stays remarkably close to the original drama for its day (it was customary to alter Metastasian texts considerably so long after their original performances), but the role of Timante was augmented in order to highlight the talents of its interpreter, the distinguished male soprano Gaetano Guadagni.  All of Mysliveček's operas are of the serious type in Italian referred to as opera seria. Il Demofonte, also: "Demofonte", "Demofoonte" or "Demofont" (Russian/Ukrainian: "Демофонт" or "Демофон") is an opera seria by the Ukrainian composer Maksym Berezovsky (1745–1777) composed in 1773 to an Italian libretto by Pietro Metastasio. Christoph Willibald (Ritter von) Gluck (] ; 2 July 1714 – 15 November 1787) was a composer of Italian and French opera in the early classical period.  Born in the Upper Palatinate (now part of Germany) and raised in Bohemia, he gained prominence at the Habsburg court at Vienna, where he brought about the practical reform of opera's dramaturgical practices that many intellectuals had been campaigning for over the years.  With a series of radical new works in the 1760s, among them "Orfeo ed Euridice" and "Alceste", he broke the stranglehold that Metastasian "opera seria" had enjoyed for much of the century. Scott Joiner is an American operatic tenor and composer.  He created the role of Dickon in the world premiere of Nolan Gasser's "The Secret Garden" with the San Francisco Opera and Cal Performances in 2013.  He composed the score and starred in the short opera film, "Connection Lost (The Tinder Opera)" or "L'opera di Tinder", which won Best Score at Ireland's Kerry Film Festival.  The miniature one-act opera received its live stage premiere by Opera Carolina in November 2016 as part of National Opera Week.  Joiner and Tinder Opera Co-creator, Adam Taylor (writer/director) were featured on NPR’s "All Things Considered" in 2017. Der Waffenschmied (The Armourer) is an opera (Singspiel) in three acts by Albert Lortzing.  The German-language libretto was by the composer after Friedrich Wilheim von Ziegler's "Liebhaber und Nebenbuhler in einer Person" (Lover and Rival in One Person).  This is often considered his third most popular work.  His works are considered to be part of the Biedermeier period.  It premiered in Vienna at the Theater an der Wien on 31 May 1846 conducted by Lortzing.  The role of Marie was written with Jenny Lind in mind who he hoped would sing the part.  The opera was eventually successful enough that Lortzing was offered the post of Kapellmeister at the theatre which he held until the revolution of 1848, when he had to return to Leipzig.  Arnold Schönberg, arranged Lortzing’s "Waffenschmied“ for piano for 4 hands.  The story is set in the city of Worms in the 16th century. Demofoonte is a dramma per musica or opera in 3 acts by composer Christoph Willibald Gluck.  The work uses an Italian language libretto by Pietro Metastasio.  The opera premiered on 6 January 1743 at the Teatro Regio Ducal in Milan. Démophoon (sometimes spelt Démophon) is an opera by the composer Luigi Cherubini, first performed at the Académie Royale de Musique (the Paris Opera) on 2 December 1788.  It takes the form of a "tragédie lyrique" in three acts.  The libretto, by Jean-François Marmontel, is based on "Demofoonte" by Metastasio.
Answer: early classical