Pope Pius V issues the bull Regnans in Excelsis, excommunicating Queen Elizabeth I of England and absolving her subjects from allegiance to her. The bull is subsequently published in London in May by a Catholic, John Felton, provoking harsh anti-Catholic legislation in response.
Editors. "Pope Pius V excommunicates Elizabeth I". The Literary Encyclopedia. First published 01 November 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=2020, accessed 01 May 2016.]