Flavio, re de' Longobardi ("Flavio, King of the Lombards", HWV 16) is an opera seria in three acts by George Frideric Handel. The Italian-language libretto was by Nicola Francesco Haym, after Matteo Noris's Flavio Cuniberto. It was Handel's fourth full-length opera for the Royal Academy of Music. Handel had originally entitled the opera after the character of Emilia in the opera. Flavio is unusually concise for an opera by Handel of this period.
https://en.wikipedia.org/wiki/Flavio