|←Author Index: Eu||Pope Eugene I
|Pope from 10 August 654, to 1 June 657.|
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- “Popes Eugene I-IV,” in Catholic Encyclopedia, 1913.
- “Eugenius” in Encyclopædia Britannica, (11th ed.), 1911
Works by this author published before January 1, 1923 are in the public domain worldwide because the author died at least 100 years ago. Translations or editions published later may be copyrighted. Posthumous works may be copyrighted based on how long they have been published in certain countries and areas.