Roma antica melodramma

 Ancient Roman history, mythology, and politics have served as the foundation for hundreds of Italian-language operas, particularly during the Baroque and Classical eras when the opera seria genre heavily relied on Metastasio's Roman librettos.

Here is a comprehensive list of exactly 50 distinct Italian operas set during the Roman Kingdom, Republic, or Empire:

Operas Set During the Roman Kingdom & Republic

1. Lucrezia by Ottorino Respighi (The fall of the Roman monarchy)
2. Numa Pompilio by Johann Adolf Hasse (The legendary second king of Rome)
3. I Orazi e i Curiazi by Domenico Cimarosa (The legendary battle of the triplets)
4. Orazi e Curiazi by Saverio Mercadante (A later Bel Canto retelling of the same conflict)
5. Muzio Scevola by Francesco Cavalli (The legendary defender of early Rome)
6. Il Muzio Scevola by Filippo Amadei, Giovanni Bononcini, and George Frideric Handel (A collaborative Baroque opera)
7. Tito Manlio by Antonio Vivaldi (The strict Roman consul during the Latin War)
8. Caio Fabbricio by Johann Adolf Hasse (The incorruptible diplomat in the war against Pyrrhus)
9. Attilio Regolo by Johann Adolf Hasse (The heroic prisoner of the First Punic War)
10. Marco Attilio Regolo by Alessandro Scarlatti (An earlier Baroque look at the same general)
11. Scipione Africano by Francesco Cavalli (The general who defeated Hannibal)
12. Scipione by George Frideric Handel (Focusing on Scipio’s virtue after capturing New Carthage)
13. Scipione in Cartagine by Saverio Mercadante (The Punic Wars from a Bel Canto lens)
14. Il sogno di Scipione by Wolfgang Amadeus Mozart (A dramatic allegory featuring Scipio Aemilianus)
15. Tito Sempronio Gracco by Alessandro Scarlatti (The reformist Gracchi brothers era)
16. Caio Mario by Domenico Cimarosa (The political clash between Marius and Sulla)
17. Lucio Silla by Wolfgang Amadeus Mozart (The dictatorship of Lucius Cornelius Sulla)
18. Il Pompeo by Alessandro Scarlatti (The early triumphs of Pompey the Great)
19. Pompeo Magno by Francesco Cavalli (An earlier Venetian treatment of Pompey)
20. Catone in Utica by Leonardo Vinci (Cato the Younger's final stance against Julius Caesar)
21. Catone in Utica by Antonio Vivaldi (Vivaldi's setting of the same tragic libretto)
22. Giulio Cesare in Egitto by George Frideric Handel (Caesar's arrival in Egypt following Pompey's defeat)
23. Giulio Cesare by Gian Francesco Malipiero (A 20th-century interpretation of Caesar's life)
24. Cleopatra by Domenico Cimarosa (The fatal romance of the late Republic)
25. Antonio e Cleopatra by Gian Francesco Malipiero (The clash between Mark Antony and Octavian)

Operas Set During the Roman Empire [1]

26. L'incoronazione di Poppea by Claudio Monteverdi (The court and intrigues of Emperor Nero)
27. Nerone by Arrigo Boito (Nero's psychological downfall and the burning of Rome)
28. Nerone by Pietro Mascagni (A late Romantic take on Nero's final days)
29. Nerone fatto Cesare by Antonio Vivaldi (Nero's rise to the imperial throne)
30. Ottone by George Frideric Handel (The Year of the Four Emperors)
31. Eliogabalo by Francesco Cavalli (The eccentric and decadent reign of Elagabalus)
32. Aureliano in Palmira by Gioachino Rossini (Emperor Aurelian’s campaign against Queen Zenobia)
33. Zenobia in Palmira by Giovanni Paisiello (The same Eastern Roman crisis from a Classical perspective)
34. Zenobia by Tommaso Albinoni (An early Venetian setting of the Zenobia crisis)
35. La vestale by Saverio Mercadante (The forbidden love of a Roman Vestal Virgin)
36. Virginia by Saverio Mercadante (A tragic tale of Roman civic virtue and corruption)
37. Virginia by Alessandro Nini (Another Bel Canto treatment of the tragic Roman heroine)
38. Fausta by Gaetano Donizetti (The tragic household affairs of Emperor Constantine the Great)
39. Poliuto by Gaetano Donizetti (Christian martyrdom under Roman rule in Armenia)
40. Norma by Vincenzo Bellini (The Roman occupation of Gaul under Proconsul Pollione)
41. Attila by Giuseppe Verdi (The collapse of the Western Empire under the Hun invasion)
42. Farnace by Antonio Vivaldi (The conflict between Rome and the Kingdom of Pontus)
43. Lucio Papirio dittatore by Johann Adolf Hasse (The strict military discipline of the Republic)
44. Lucio Papirio by Antonio Caldara (An earlier court-Baroque production of the same story)
45. Sulpizia by Antonio Caldara (A rare Baroque opera centered on a Roman poetess)
46. Giustino by Antonio Vivaldi (The rise of Justin I, bridging Classical Rome into Byzantium) [1, 2, 3, 4, 5]

Multiple Variations of "La clemenza di Tito" & "Ezio"

Because early Italian opera heavily favored standard, recycled librettos written by Metastasio, different composers often wrote entirely distinct musical works based on the same imperial Roman figures:

47. La clemenza di Tito by Wolfgang Amadeus Mozart (The mercy of Emperor Titus after a conspiracy)
48. Ezio by George Frideric Handel (The struggles of General Flavius Aetius in late Rome)
49. Ezio by Christoph Willibald Gluck (Gluck's reform-era setting of the Aetius tragedy)
50. Ezio by Nicola Porpora (A highly virtuosic Neapolitan Baroque setting of the same story) [1]

Would you like to narrow this list down to a specific musical era (like Baroque or Bel Canto), or explore the historical plotlines of any particular opera mentioned here?