Wikipedia
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.
The opera libretto Il Demofonte was written by Metastasio in 1731 (or 1733) and became immensely popular. By 1800 it had inspired at least 73 operas (according to the Encyclopaedia Musical St. Petersburg: The 18th Century)
The version by Maksym Berezovsky is especially important for music history as the first opera by a Russian as well as a Ukrainian composer.
Demofonte (also Demofoonte; Il Demofoonte; Demofoonte, ré di Tracia [King of Thrace]; Démophon; Demophontes; or Dirce, L'usurpatore innocente ["Dirce, The Innocent Usurper") is an opera seria libretto by Metastasio. The libretto was first set by Antonio Caldara in 1733, but remained popular throughout the eighteenth century and was set over seventy times.