"Una Voce Poco Fa"

Una Voce Poco Fa ('A voice a little while ago') is an aria sung by Rosina at the opening of Act I of Rossini's opera, 'The Barber of Seville'.  This is the same Rosina who featured as an older wife in the earlier opera by Mozart, The Marriage of Figaro.  Figaro, here, is the Barber.

Listen here on Spotify to the aria sung by Maria Callas.