Teseo
![](/Images/godic/202502/15/George_Frideric_Handel_by_Balthasar_Denner3642.jpg")
![The Queen's Theatre, London, where Teseo had its first performance.](/Images/godic/202502/15/London_Kings_Theatre_Haymarket3642.jpg")
![Caricature of Valentino Urbani, who created the role of Egeo.](/Images/godic/202502/15/Valentino_Urbani3642.jpg")
![George Romney – Lady Hamilton as Medea.](/Images/godic/202502/15/George_Romney_-_Lady_Hamilton_as_Medea3642.jpg")
Teseo ("Theseus", HWV 9; Italian pronunciation: [teˈzɛo]) is an opera seria with music by George Frideric Handel, the only Handel opera that is in five acts. The Italian-language libretto was by Nicola Francesco Haym, after Philippe Quinault's Thésée. It was Handel's third London opera, intended to follow the success of Rinaldo after the unpopular Il pastor fido.