Proselytizing schools, though supported by public grants, entirely failed.
Russia, which had been their warmest patron, drove them from St Petersburg and Moscow in 1813, and from the whole empire in 1820, mainly on the plea of attempted proselytizing in the imperial army.
The mother discouraged the affair, and, though Voltaire tried to avail himself of the mania for proselytizing which then distinguished France, his father stopped any idea of a match by procuring a lelire de cachet, which, however, he did not use.
The only effort at proselytizing of which we have record came to an untimely end in the death of the Theatine monk, Antonio Ventimiglia, who had been its originator.
Defection from Zoroastrianism was punished with death, and therefore also the proselytizing of the Christians, though the Syrian martyrologies prove that the kings frequently ignored these proceedings so long as it was at all possible to do so.