Cathari

According to Canon 95 of the Quinisext Ecumenical Council, Arians, Macedonians, Novatians (Cathari), Aristeri, Tetradites, and Apollinarians ought to be received on their presentation of certificates of faith and on their anathematizing every heresy by the anointing of the holy chrism, as opposed to Paulianists, Eunomeans, Montanists, and Sabellians, who ought to be rebaptized, while Manichoeans, Valentinians, Marcionites, Nestorians, Eutychians, Dioscorus, Severus, and all of similar heresies ought to give certificates of faith and anathematize each his own heresy in order to participate in the eucharist.

First, Cardinal Kasper refers to canon eight of the Council of Nicaea, which instructs that the rigorous cathari must not boycott communion when in second marriages (i.e.

He insists instead that most medieval chroniclers simply lumped various disparate, amorphous, and even hostile groups of spiritual dissenters into one monolithic movement and so influenced the way modern scholars have viewed medieval heresy (and especially the so-called Cathari) ever since.

Peter has in mind the Cathari, who became widely known in twelfth-century southern France (Languedoc) as Albigensians, appear in legislation of Lateran III (1179) and became the object of an abortive crusade in 1181; see Wakefield and Evans, Heresies of the High Middle Ages 29-50.

[...] Among the opponents of the Resurrection we naturally find first those who denied the immortality of the soul; secondly, all those who, like Plato, regarded the body as the prison of the soul and death as an escape from the bondage of matter; thirdly the sects of the Gnostics and Manichaeans who looked upon all matter as evil; fourthly, the followers of these latter sects the Priscillianists, the Cathari, and the Albigenses; fifthly, the Rationalists, Materialists, and Pantheists of later times.