The Doctrine of the Ordo Sclavoniae in Light of Western Sources and the Issue of the Origins of the Dualist Heresy in Bosnia

The issue of the Bosnian church – or more precisely dualist heresy in Bosnia has caused serious controversies among scholars since 19th century. main aim this paper is to shed new light on controversial issue, through analysis doctrine Slavonic dualism (ordo Sclavoniae) based Western sources. subject will be sources concerning contacts Cathars from France and Italy with heretics Sclavonia especially containing information doctrine, such as 13th-century Italian presenting doctrines belonging ordo Sclavoniae (Cathar churches Bagnolo March de Treviso) later, 14th 15th-century teachings Bosnia. reconstruct order find its distinctive features (especially comparing two forms Bogomil-Cathar Bulgarian Drugunthian) answer following question: which doctrinal conceptions had most significant influence formation? Knowledge inspiration for enable us draw conclusions origins dualism, evolution assume an attitude towards scholars’ character heresy.