Clément Philibert Léo Delibes (] ; 21 February 1836 – 16 January 1891) was a French composer of the Romantic era (1815–1910), who specialised in ballets, operas, and other works for the stage.
 His most notable works include the ballets "Coppélia" (1870) and "Sylvia" (1876), as well as the operas "Le roi l'a dit" (1873) and "Lakmé" (1883).
Balanchine's had previously made a "pas de deux" to music from Léo Delibes' "Sylvia" in 1950; he expanded this into a divertissement in 1965.
 The final version uses music from Delibes' ballets "La source" and "Sylvia" and choreography from the earlier pas de deux and divertissement.
Nina, o sia La pazza per amore ("Nina, or the Girl Driven Mad by Love") is an opera, described as a "commedia in prosa ed in verso per musica", in two acts by Giovanni Paisiello to an Italian libretto by Giambattista (also "Giovanni Battista") Lorenzi after Giuseppe Carpani's translation of Benoît-Joseph Marsollier's "Nina, ou La folle par amour", set by Nicolas Dalayrac in 1786.
Giovanni Paisiello (or Paesiello; 9 May 1740 – 5 June 1816) was an Italian composer of the Classical era.
Il re Teodoro in Venezia is a 1784 comic opera by Giovanni Paisiello to a libretto Giovanni Battista Casti.
 Premiered at the Burgtheater Vienna, it was revived for Carnival in Parma in 1788.
La serva padrona (The Servant Turned Mistress) is an opera buffa by Giovanni Battista Pergolesi (1710 – 1736) to a libretto by Gennaro Antonio Federico, after the play by Jacopo Angello Nelli.
 The opera is only 45 minutes long and was originally performed as an intermezzo between the acts of a larger serious opera.
 (The same libretto was set by Giovanni Paisiello in 1781.)
Yekaterina Alexeyevna Sinyavina (died 1784) was a Russian composer and pianist.
 A cembalo concerto by Giovanni Paisiello was probably first performed at the court of Catherine II in 1781 with Sinyavina as soloist.
 She served as a lady-in-waiting and composer at the court, married Count Simon Romanovich Vorontsov and died in St. Petersburg.
"La source (The Spring)" is a ballet in three acts/four scenes with a score composed by Léo Delibes and Ludwig Minkus (Minkus: Act I & Act III-Scene 2/Delibes: Act II & Act III-Scene 1) which was premiered in 1866 with choreography by Arthur Saint-Léon.
 In 1878 in Vienna it was called "Naïla, die Quellenfee" ("Naïla, the Waternymph").
Proserpine is a French-language opera by the Italian composer Giovanni Paisiello.
 It takes the form of a "tragédie lyrique" in three acts.
 The libretto, by Nicolas-François Guillard, is a reworking of Philippe Quinault's "Proserpine".
 Paisiello's opera was first performed on 28 March 1803 at the Paris Opéra.
Giovanni Battista Lorenzi (1721–1807) was an Italian librettist.
 He was born and died in (Naples, and was a friend of Giovanni Paisiello, with whom he collaborated on numerous operas.

Question: Which composer lived earliest: Giovanni Paisiello or Léo Delibes?
Answer: Giovanni Paisiello