Wikipedia
Euridice (also Erudice or Eurydice) is an opera by Jacopo Peri, with additional music by Giulio Caccini. It is the earliest surviving opera, Peri's earlier Dafne being lost. (Caccini wrote his own " Euridice" even as he supplied music to Peri's opera, published this version before Peri's was performed, in 1600, and got it staged two years later.) The libretto by Ottavio Rinuccini is based on books X and XI of Ovid's Metamorphoses which recount the story of the legendary musician Orpheus and his wife Euridice.
The opera was first performed in Florence on 6 October 1600 at the Palazzo Pitti with Peri himself singing the role of Orfeo.
Euridice is an opera in a prologue and one act by the Italian composer Giulio Caccini. The libretto, by Ottavio Rinuccini, had already been set by Caccini's rival Jacopo Peri in 1600. Caccini's version of Euridice was first performed at the Pitti Palace, Florence on 5 December 1602. Caccini hurriedly prepared the score for the press and published it six weeks before Peri's version appeared.