An important source base for the scientific work of the Fraknó Research Group is the 17th century canonical investigation records. Continuing the work begun with the publication of the processus informativus of Péter Pázmány (1616–163
7) (CVH II/6), this volume deals with Pázmány's three successors: Imre Lósy (1637–1642), György Lippay (1642–1666) and György Szelepchény (1666–1685).
The Vilmos Fraknói Vatican Historical Research Group of the Hungarian Academy of Sciences and the Péter Pázmány Catholic University was established in the June of 2012 as the ‘Impetus’ Church History Research Group in the frame of the Church History Research Institute of the University founded by Rector Péter Erdő in 1999. It carries on independently the latter’s publications (Bibliotheca Historiae Ecclesiasticae Universitatis Catholicae de Petro Pázmány Nuncupatae) and researches in Rome and in Vienna, with the involvement of academic and other funding sources.
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Több folyamat együttes hatása okozta Kanizsa középkori eredetű egyházi struktúrájának lassú hanyatlását.