Das Biographisch-Bibliographische Kirchenlexikon (BBKL) ist ein biographisches Nachschlagewerk zur Kirchengeschichte, begründet 1975 von Friedrich Wilhelm Bautz. Mit über 20.000 Artikeln, die sowohl von renommierten Wissenschaftlern als auch von interessierten Laien verfasst wurden, gilt das BBKL als sehr aktuelle und umfangreiche biographische Informationsquelle zu Personen der Kirchen-, aber auch der Philosophiegeschichte. Nur der auf knappe Kurzinformationen beschränkte biografische Teil der BBKL ist kostenfrei zugänglich, der Rest ist lizenzpflichtig.

Digi20 concentrates on the digitalization of monographs published in the second half of the 20th century, predominantly in the field of humanities and social sciences. In the first phase of the project, approx. 4,700 titles of programme segments of the publishers Vandenhoeck & Ruprecht, Wilhelm Fink / Ferdinand Schöningh as well as Otto Sagner were digitized. In a second phase, further approx. 1,750 titles are being included till 2014 by consecutively digitizing all monographs up to a defined ‘Moving Wall’ of three to five years to the current year of publication.

From the first book published in English, the book from William Caxton, through the age of Spenser and Shakespeare and the tumult of the English Civil War, this collection contains about 100,000 of over 125,000 titles listed in Pollard & Redgrave's Short-Title Catalogue (1475-1640) and Wing's Short-Title Catalogue (1641-1700) and their revised editions, as well as the Thomason Tracts (1640-1661) collection and the Early English Books Tract Supplement. -- Angefangen vom ersten in englischer Sprache veröffentlichten Buch, das Buch von William Caxton, hindurch durch das Zeitalter von Spenser und Shakespeare und den Tumult des Englischen Bürgerkrieges, umfasst diese Sammlung mehr als 100.000 der 125.000 in den Kurztitelkatalogen von Polard & Redgrave (1475-1640) und Wing (1641-1700) gelisteten Bücher im Volltext. Hinzu kommen die Titel der Thomason Tracts-Sammlung (1640-1661) und das Early English Books Tract Supplement.

The collection licensed by the DFG comprises 1000 e-Books. In addition, access to 3,400 free electronic books from all subject areas is provided.

The Mohr Siebeck eBooks collection contains academic books, series and multi-volume works in the subject areas of theology, history, phiosophy, law, economics and sociology. The book selection is continuously extended by single e-book acquisitions and series purchases by MPG libraries.

Developed cooperatively with scholars and librarians worldwide, Oxford Bibliographies offers exclusive, authoritative research guides across a variety of subject areas. Combining the best features of an annotated bibliography and a high-level encyclopedia, this cutting-edge resource directs researchers to the best available scholarship across a wide variety of subjects.

Oxford Handbooks Online is a collection of handbooks in 17 subject areas, bringing together the world's leading scholars to write review essays that evaluate the current thinking on a field or topic, and make an original argument about the future direction of the debate. For the first time, all Handbooks are available online as well is in print across the subject areas. Monthly updates introduce articles in advance of print publication and beyond the book, online-only content ensures the most current, authoritative coverage anywhere.

Including Oxford Scholarship Online (OSO), the University Press Scholarship Online (UPSO) publishes new books every month from an ever-growing roster of contributing presses, each adding to the variety of subjects covered on the platform. The MPG purchased the volumes 2003-2013/2014 of 16 OSO subject collections. This selection is continuously extended by single e-book acquisitions by MPG libraries.

Facsimile edition of the "Patrologia Graeca", edited by Jacques-Paul Migne from 1857 to 1866 in more than 160 volumes. The database comprises works of the Greek church literature beginning with Pseudo-Clemens (100 AD) up to Kallistos (1478) and thus makes available the important Greek Christian authors and the most influential works of theology, philosophy, history and literature of the late ancient world and the early Middle Ages. Texts are made easily accessible by an index of contents in Latin and Greek language, by an index of authors, a title index and an index of subject. All of these indexes are full text ones.

The Patrologia Latina Database is an electronic version of the first edition of Jacques-Paul Migne's Patrologia Latina, published between 1844 and 1855, and the four volumes of indexes published between 1862 and 1865. Patrologia Latina comprises the works of the Church Fathers from Tertullian in 200 AD to the death of Pope Innocent III in 1216. The complete Patrologia Latina is included with all prefatory material, original texts, critical apparatus and indexes. Migne's column numbers, essential references for scholars, are included.

The SpringerLink platform provides MPG staff with access to a huge collection of English and German eBooks from 2005 onwards, as well as the English and the German collection of the Springer Book Archive (1842-2004). In addition, the content of selected book series is available. Includes major reference works and dictionaries. Max Planck researchers who publish a monograph or edited volume with Springer Nature as an Open Access eBook receive a discount on the standard Book Publishing Charge. MPDL covers the costs remaining on a pro rata basis. Further details are available on the MPDL website.

Since the publication of its first installment in 1976 the Theologische Realenzyklopädie has provided a comprehensive account of the state of theological research. Some 2000 articles present a multitude of historical and theological data in their context of faith and thought, theology and religion. A multidisciplinary approach integrates into the theological account not only the disciplines of Old Testament and New Testament Studies, Church History, and Systematic and Practical Theology but also Judaic Studies, Religious Studies and Philosophy.

Universitetskaja Biblioteka Online offers ebooks on Russian Literature and Linguistics, History, Law, Economics, Social Sciences and Culture as well as Russian, Eurasian and Slavic Studies. The ebooks are hosted on University Library Online, e-content platform with English language interface. Additionally, for gaining a deeper understanding of Russia and Russian language, it provides access to: encyclopedias, audiobooks and maps.