His contribution to the development of Italian opera, a particularly intrinsic aspect of the Neapolitan School as a whole, is especially lauded as well as his writings of sacred works and cantatas.
His name can be found in historical sources being lauded with other members like Nicola Porpora, Alessandro Scarlatti, and Giovanni Battista Pergolesi.
In 1735, Mancini was forced to conclude his participation at the Conservatory due to issues with his wellbeing, the substitute in his absence being Giovanni Fischietti.
Mancini was also well respected within his cultural milieu outside of purely music and as such, as in the case of poet Aurora Sanseverino, he was called upon for commissions.
[7] He also benefited from the distribution of his works outside of Italy thanks to printed collections made by European publishers at the time, one of them being the French printer Michel-Charles Le Cène.