Il Gemmario, an anonymous 16th-Century treatise, survives in a unique witness, MS Ambr. S 78
sup., a miscellaneous manuscript formerly owned by Gian Vincenzo Pinelli. According to Pinelli’s
autograph notes, to some autobiographical hints and the use of sources in the text, it appears to be
a work of Jacopo Corbinelli, written probably before his exile from Florence. Il Gemmario is one
of the earliest texts following Giovanni Della Casa’s Galateo; however Corbinelli suggests original
issues to the debate on the literary use of the vernacular and of Latin.