- Association of Hungarian Church
- Archivists
- Association of Hungarian Archivists
- Association of the Ecclesiastical Libraries
- Archivum Romanum Societatis Iesu
- Archivum Provinciae Austriae Societatis Iesu
- Central Archives of the Hungarian Province of the Piarist Order
- Hungarian Franciscan Library and Archives
- Archives of the Archdiocese and Cathedral Chapter of Veszprém
- Roman-Catholic Ecclesiastical Collection in Sárospatak
