Giovanni Battista Fiorini was an Italian painter of the late Renaissance period.
He was a native of Bologna.
He was active at the close of the 16th century, and died after 1595.
He is chiefly known as a coadjutor of Cesare Aretusi, with whom he painted several pictures at Bologna and Brescia, and distinguished himself especially as a good designer.
This article about an Italian painter born in the 16th century is a stub.