Pope Sixtus V excommunicates Henry of Navarre, the Huguenot heir to
the French throne.
Citation:
Editors. "Pope Sixtus V excommunicates Henry of Navarre".
The Literary Encyclopedia. First published 01 February 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=15321, accessed 19 June 2013.]