In addition to archaeological evidence, Zenobia's life was recorded in different 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. The author (or authors) of the "Augustan History" invented many events and letters attributed to Zenobia in the absence of contemporary sources. Some "Augustan History" accounts are corroborated from other sources, and are more credible. The Byzantine chronicler Joannes Zonaras is considered an important source for the life of Zenobia.