Abrogans, also Codex Abrogans, is probably the oldest book in the German language. It concerns a hand written Latin to Old High German dictionary (or also glossary, or word-list) of synonyms from the 8th Century (765-775). It was several times copied, however only one copy has remained preserved in the library of St. Gallen to the present. It is named after the first entry in the glossary: abrogans = modesty, humility. Occasionally this work was attributed to the clergyman Arbeo of Freising, (d. 783 or 784).

References

• Codex Abrogans, a digital copy. Latin and German.