Beatus was persuaded that the Apocalypse described in the book of Revelation was imminent, which would be followed by 1290 years of domination by the Antichrist.
Beatus var overbevist om, at apokalypsen, som den er beskrevet i Johannes' Åbenbaring, var nært forestående, og at den skulle følges af 1.200 år med Antikrists herredømme.