Skip to content


The Index Religiosus begins from the basis of two existing bibliographies: the bibliography of the Revue d’histoire ecclésiastique and the Elenchus Bibliographicus from the journal Ephemerides Theologicae Lovanienses. These two tools are internationally recognized as essential working instruments for Theology and Religious Studies.


Scope and aims

The Index Religiosus is an internationally renowned bibliography of academic publications in the fields of theology, religious sciences, and Church history. It is a gateway to books and articles written in major European languages (English, French, German, Italian, Spanish, Dutch, Portuguese, etc.). The bibliography stems from the fruitful collaboration between two institutions that are known for their expertise in the aforementioned domains – the Katholieke Universiteit Leuven (KU Leuven) and the Université Catholique de Louvain (UCL).


The Index Religiosus covers the full range of disciplines in Theology and Canon Law: History of Theology, History of  Religions, Old and New Testaments, Fundamental and Dogmatic Theology, Sacramentology and Liturgy, Moral and Pastoral Theology, and Canon Law.

All aspects of Church History are also widely covered: Institutions; Orders; Congregations; Influential Figures; Hagiography; Political, Social and Economic History; Archaeology; Art History; Music; Architecture; Relations with Islam and Judaism; and more, which makes the Index Religiosus a tool of the first order for all manner of disciplines.

Index Religiosus: view of a bibliographical record

Index Religiosus: view of a bibliographical record

Key features

  • Approximately 668,000 bibliographic records and 160,000 review references are searchable (January 2023)
  • More than 20,000 new records every year
  • Over 1000 journals systematically checked
  • Multilingual Interface (English, French, Spanish, Italian and German)
  • Indexing in English and French
  • Extensive search possibilities (Author, Title, Year of Publication, ISBN / ISSN, Geographic Area, Discipline, Period, Keyword, Person, etc.)
  • Ability to query the database from Bible Verses, the Tenets of Canon Law, or the Dead Sea Scrolls
  • Ability to export records in several formats (Endnote, Microsoft Office Word, Refworks, Zotero, etc.)
  • Ability to create email alerts with notification of new publications
  • Compatible with OpenURL
  • DOI links to articles in journals and miscellany volumes
  • Direct links to the Dictionnaire d’histoire et de géographie ecclésiastiques, Die Bischöfe des Heiligen Römischen Reiches and the Library of Latin Texts
  • Links to Google books


The Index Religiosus is the fruit of a partnership between the Catholic University of Louvain, the KU Leuven and Brepols Publishers.


English version (PDF)


Webinar (English version)

Webinar (French version)

PowerPoint presentations

English presentation (PowerPoint file)

French presentation (PowerPoint file)


Related Databases

See also the Dictionnaire d’histoire et de géographie ecclésiastiques.

User help



© KU Leuven, Université Catholique de Louvain-la-Neuve & Brepols Publishers n.v.

© Online version, Functional Design and Publication Rights by Brepols Publishers n.v. (Turnhout, Belgium)

Terms and conditions

Terms and conditions.

%d bloggers like this: