The Holy Office!
The Congregation for the Doctrine of the Faith!
Whichever name it has used, this is the arm of the Vatican that oversees the doctrinal integrity of the Faith. It watches, with eagle eyes, the goings on of theologians and other suspects around the world.
Its staff is omnipresent, with sub-offices in every country and in most major dioceses. Its minions send daily reports to headquarters, where countless clerical workers do nothing...