Complex sentence: In addition to archaeological evidence, Zenobia's life was recorded in many ancient sources but many are flawed or fabricated; the "Augustan History", a late-Roman collection of biographies, is the most notable (albeit unreliable) source for the era.
Split into simpler sentences: In addition to archaeological evidence, Zenobia's life was recorded in many ancient sources; however, many are flawed or fabricated. The "Augustan History", a late-Roman collection of biographies, is the most notable (albeit unreliable) source for the era.