Editors. "Pope Leo X confers the title 'Defender of the Faith' on Henry VIII". The Literary Encyclopedia. First published 01 November 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=14282, accessed 11 December 2013.]
Henry VIII is granted the title 'Defender of the Faith' by Pope Leo X, in response to his book 'Assertio Septem Sacramentorum', which defended the Church's doctrine of the seven sacraments against the attacks of Martin Luther.