Complex sentence: By AD 8, he had completed his most ambitious work, the "Metamorphoses", a hexameter epic poem in 15 books which encyclopedically catalogues transformations in Greek and Roman mythology from the emergence of the cosmos to the deification of Julius Caesar.
Split into simpler sentences: By AD 8, he had completed his most ambitious work, the "Metamorphoses", a hexameter epic poem in 15 books. The work encyclopedically catalogues transformations in Greek and Roman mythology, from the emergence of the cosmos to the deification of Julius Caesar.