Libraries by Doctrine/Theology
Online libraries and digital collections, gathered under the doctrine and theology they serve and organized by the traditions of the Church directory. Each entry names its access and its focus, and links directly to the library.
The general libraries serve many traditions at once. They stand in the General section, and they also appear in every tradition view.
General / Multi-Tradition
Atla Digital Library
Digitized collections from theological libraries and religious institutions worldwide, including manuscripts, photographs, and archival records.
Bibliotheca Religiosa IntraText
A full-text digital library of primary theological writings across Christianity, Buddhism, Hinduism, and Islam.
Christian Classics Ethereal Library
Classic Christian texts, commentaries, hymnals, dictionaries, and reference works, free to read and search.
Globethics.net Library
A free online library and repository on applied ethics, education, and religious studies, with collections across the world's traditions.
HathiTrust
A partnership of academic institutions holding millions of digitized titles; public-domain volumes are free to read in full.
Index Theologicus (IxTheo)
A comprehensive open-access bibliography for theology and religious studies, indexing journals, books, and articles.
Internet Sacred Text Archive
A freely available archive of electronic texts on religion, mythology, and folklore, holding the scriptures of many traditions.
Open Access Digital Theological Library
A curated library of open-access books and articles in theology and religious studies, gathered from publishers and repositories worldwide.
Princeton Theological Seminary Theological Commons
More than 168,000 resources on theology and religion: books, journals, audio, and manuscripts from the Princeton Seminary library.
St Andrews Encyclopaedia of Theology
An open-access, multi-author theological reference with advanced articles on Christianity, Judaism, Islam, Hinduism, and Buddhism.
Anabaptist — Christian
Global Anabaptist Mennonite Encyclopedia Online
Reliable information on Anabaptist congregations, people, and historical and theological topics, with the full texts of Mennonite confessions.
Menno Simons.net
The life, complete writings, doctrine, and images of Menno Simons, including English translations of his works.
Anglican — Christian
Anglican Communion Office Document Library
More than 1,500 communiqués, resolutions, and papers documenting the life and work of the Anglican Communion since 1867.
Digital Library of Classic Protestant Texts
An extensive collection of Reformation and post-Reformation texts, including Reformed, Anglican, and Presbyterian works, by subscription or perpetual access.
Project Canterbury
A free archive of out-of-print Anglican works and related modern documents, transcribed and hosted by the Society of Archbishop Justus.
Baptist — Christian
Baptist Heritage Library
An open-access digital archive of Baptist identity, mission, and practice, hosted on the Internet Archive with full-text search.
Southern Baptist Historical Library and Archives
Digital resources of the Southern Baptist Convention: annuals, biographies, newspapers, photographs, manuscripts, and periodicals.
Catholic — Christian
Catholic Culture
An online library, dictionary, and document search representing more than 2,000 years of Catholic scholarship and teaching.
Clerus.org / BIBLIACLERUS
The electronic library of the Congregation for the Clergy: the Bible in many languages with commentaries, and the documents of the Church.
Corpus Thomisticum
The complete works of St. Thomas Aquinas, with manuscripts, bibliography, and research tools for Thomistic study.
FORMED
A Catholic streaming platform with video studies, movies, audio programs, and ebooks, offered by subscription through parishes and directly.
Verbum
A Catholic digital library with interactive study tools and packaged collections of Scripture, the Fathers, and Catholic scholarship.
Eastern Orthodox — Christian
Azbyka.ru
A large Orthodox portal holding tens of thousands of electronic books by the Church Fathers and Orthodox scholars, in Russian.
Monachos.net
A freely available site dedicated to Orthodox Christianity through its patristic, monastic, and liturgical heritage.
RESILIENCE / IMD Library
Free access to Orthodox theological books, scholarly reviews, and periodicals, with abstracts in Greek and English.
Lutheran — Christian
Concordia Electronic Theological Library
The complete Concordia collection in Logos/Verbum format: Lutheran confessional writings, historical theology, and reference works, by purchase or subscription.
Project Wittenberg
Works by and about Martin Luther and other Lutherans: quotations, commentaries, hymns, statements of faith, and theological treatises.
Methodist and Wesleyan — Christian
American Methodism Project
A digitized collection of interdisciplinary and historical materials related to American Methodism, hosted on the Internet Archive.
Center for Studies in the Wesleyan Tradition (Duke)
Duke Divinity School's center for Methodist and Wesleyan studies, developing research resources and online editions of John and Charles Wesley's works.
Wesley Center Online
Historical and scholarly resources on the Wesleyan tradition, theology, and the Church of the Nazarene, from Northwest Nazarene University.
Wesleyan-Holiness Digital Library
A free digital library of more than 8,000 resources in over 70 languages, for ministerial preparation, education, and spiritual development; an interdenominational project created by the Global Church of the Nazarene.
Pentecostal and Charismatic — Christian
Consortium of Pentecostal Archives
A collaborative online repository of digitized Pentecostal publications: more than 526,000 pages across 23,000 items.
Dixon Pentecostal Research Center
A specialized research library on the Pentecostal and Charismatic movement, and the archives of the Church of God (Cleveland, Tennessee).
Flower Pentecostal Heritage Center
The largest Pentecostal archives in the world, with digitized photographs, audio and video, and more than 250,000 pages of periodicals.
Holy Spirit Resource Center (Oral Roberts University)
One of the largest Pentecostal-Charismatic collections in the world: some 15,000 books, 1,300 periodicals, and thousands of audio and video materials, with digitized collections in the ORU Digital Showcase.
Reformed and Presbyterian — Christian
Digital Library of Classic Protestant Texts
An extensive collection of Reformation and post-Reformation texts, including Reformed, Anglican, and Presbyterian works, by subscription or perpetual access.
Monergism
A free, comprehensive online theological library of Reformed Christian articles, books, and ebooks.
Post-Reformation Digital Library
A select database of digital sources on theology and philosophy in the Reformation and early modern era.
Buddhist — Non-Christian
St Andrews Encyclopaedia of Theology
An open-access, multi-author theological reference with advanced articles on Christianity, Judaism, Islam, Hinduism, and Buddhism.
Hindu — Non-Christian
St Andrews Encyclopaedia of Theology
An open-access, multi-author theological reference with advanced articles on Christianity, Judaism, Islam, Hinduism, and Buddhism.
Jewish — Non-Christian
St Andrews Encyclopaedia of Theology
An open-access, multi-author theological reference with advanced articles on Christianity, Judaism, Islam, Hinduism, and Buddhism.
Muslim — Non-Christian
St Andrews Encyclopaedia of Theology
An open-access, multi-author theological reference with advanced articles on Christianity, Judaism, Islam, Hinduism, and Buddhism.