"It is an insult to the Holy Name and a disgrace to the Christian Faith that ... the Saracen priests ... meet to adore the infidel Mahomet, loudly invoke and extol his name each day ... and there make public declarations in his honor. ... This brings disrepute on our Faith and gives great scandal to the faithful. These practices cannot be tolerated any further without displeasing the Divine Majesty. We therefore ... enjoin on Catholic princes, one and all, ... to forbid expressly the public invocation of the sacrilegious name of Mahomet."    - Pope Clement V, Council of Vienne, 1311-1312