What is "calandro"

Calandro is an opera buffa in three acts composed by Giovanni Alberto Ristori to a libretto by Stefano Benedetto Pallavicini. The libretto was based on the comedy Il Calandro by Bernardo Dovizi (Cardinal Bibbiena). In turn, Dovizi's play borrowed elements of the plot from Plautus's Menaechmi and the character Calandro from Boccaccio's Decameron It was first staged on 2 September 1726 in Dresden.