Jerome (Eusebius Sophronius Hieronymus) lived between the 4th and 5th centuries. He translated the Bible into Latin as the Vulgate (Biblia Vulgata). How would he have pronounced the Latin language?
In particular, did he use the 10-vowel system (a, e, i, o, u, short and long each) or the 7-vowel system (a, i, u, open/closed e, open/closed o), or something in between? Did he merge ae/oe with e? Did he palatalize the c's before e's and i's?