"Sposa son disprezzata" ("I am wife and I am scorned") is an Italian aria written by Geminiano Giacomelli.
The aria, originally called Sposa, non mi conosci, was taken from the Geminiano Giacomelli's opera La Merope (1734), composed before Vivaldi's pasticcio Bajazet.
It was a common practice during Vivaldi's time to compile arias from other composers with one own's work for an opera.
Vivaldi has recently been attributed as the composer of the work, perhaps because Cecilia Bartoli's album "If You Love Me—'Se tu m'ami': Eighteenth-Century Italian Songs," which uses Alessandro Parisotti's 19th-century piano version, attributes the work solely to Vivaldi.
This adaptation is the most widely heard, popularized by mezzo-soprano Cecilia Bartoli in the aforementioned album If You Love Me (Se tu m'ami).