The expenses of the Court in prosecuting, punishing and imprisoning heretics, together with the maintenance of the Inquisitors and their guards, were thrown upon the communes which they visited.

Such was the organization which the Popes, aided by S.Dominic, and availing themselves of the fanatical passions aroused in the Provencal wars, succeeded in creating for their own aggrandizement.

It is strange to think that its ratification by the supreme secular power was obtained from an Emperor who died in contumacy, excommunicated and persecuted as an arch-heretic by the priests he had supported.
[Footnote 78: See Cantu, _Gli Eretici d'Italia_, vol.i.Discorso 5, and the notes appended to it, for Frederick's edicts and letters to Gregory IX.

upon this matter of heresy.

The Emperor treats of _Heretica Pravitas_ as a crime against society, and such, indeed, it then appeared according to the mediaeval ideal of Christendom united under Church and Empire.