Getica

De origine actibusque Getarum (The Origin and Deeds of the Getae/Goths), or the Getica, written in Late Latin by Jordanes (or Jornandes) in 551, claims to be a summary of a voluminous account by Cassiodorus of the origin and history of the Gothic people, which may have had the title "Origo Gothica" and which is now lost. However, we cannot assess the extent to which Jordanes actually used the work of Cassiodorus (see the discussion below on the sources also used by Jordanes). It is significant as the only remaining contemporaneous resource, which gives the full story of the origin and history of the Goths. Another aspect of this work is its information about the early history and the customs of Slavs.