Although this had been typical for 17th-century Venetian works such as Cavalli's original setting of the libretto, by the 1730s an opera seria was expected to be wholly serious, with no mixing of the genres of tragedy and comedy or high and low class characters.
Selv om dette havde været typisk for det 17. århundredes venetianske værker som fx Cavallis oprindelige komposition til librettoen, var der, i 1730'erne, opstået en forventning om, at opera seria skulle være helt alvorlig uden nogen sammenblanding af tragedie- og komediegenrerne eller figurer af høj eller lav klasse.