We have put together the following collections of free online resources as an additional research offer for you in times of shut down facilities. Some publishers have started to ease restrictions to their online collections, the lists will therefore be monitored, expanded and updated. Your comments or additions are most welcome!

Open Access search engines

BASEBielefeld Academic Search Engine
contains more than 150 million documents of which about 60% are Open Access
To find these documents enter access:1 next to your search terms into the search bar
DOAJarticles from about 12,000 Open Access journals
OpenAireOpen Access online documents compiled into one search engine


DINIList of certified Open Access repositories
PublissoLife Sciences
SSOARSocial Sciences
ostdokEastern Europe Studies
PropylaeumClassical Studies

You find more repositories sorted by research areas here. Full text access might not be possible everywhere, but ordering articles is still possible via our request forms.

Old Prints & Manuscripts

SLUB Dresdencollections of the State Library Dresden
Munich Digitization Centercollections of the State Library Munich
Wolfenbüttel Digital Libraryold prints of the Herzog August Library Wolfenbüttel
Manuscripta germanicamedieval manuscripts of the Berlin State Library
Heidelberg historic literatureManuscripts, Charters, Incunabula and other old prints from the University Library Heidelberg
GallicaCollections of the National Library of France
British LibraryMaps and manuscripts from the British Library
ÖNB digitalBooks and images from the Austrian National Library
Library of CongressCollections of the Library of Congress
Trinity CollegeCollections of the Trinity College library
NYPLCollections of the New York Public Library
Digital Public Library Americadigital library which containts collections of various US libraries
e-raradigitized rare books from Swiss institutions
Digivatlibcollections of the Vatican Library
Digital Bodleiancollections of the Bodleian Library


Collection of image databaseslink collection of the Art History Institute of the Free University Berlin
heidiCONMultimedia database of the Heidelberg University
bpkAgency BPK
Image-based similarity searchimage collections of the State Library Munich
Europeanacollections of European archives, libraries and museums

We are glad to investigate whether certain images may be reproduced in your publication and what the appertaining conditions might be.


DOAB25.000 freely available e-books
Internet Archivecollection of fair use e-books and loan of other e-books after personal login (no waiting list until June)
Hathi Trustcollection of fair use e-books from various institutions
SpringerSpringer Open Access e-books
Project Musee-books and journal that are temporarily free to use
BooklistBook reviews by the American Library Association, temporarily freely accessible


SSRNSocial Sciences
Arabixivvarious topics in Arabic

Open Educational Resources

OER include complete onlince courses, text books and other material for online seminars like videos or presentations.

List of OER collections

Family history

Stolpersteine in Berlincommemorative stones dedicating to all people persecuted by the NS regime
Berlin directoriesdirectories from 1707-1992
The Central Database of Shoah Vimctims' Namesdatabase of Yad Vashem
Holocaust Statisticsstatistics of the jewish citizens of Germany during 1933-1945 (only in German)
Hamburg Passenger Lists 1850-1934database of German immigrants to the United States
Archives Library Information Centerlink collection of genealogy resources


Restrict your search in Wikoscope to electronic to limit the results to online resources only. The detailed view will indicate a link to the full text or an abstract. Articles that aren't completely available to you may still be ordered through the request forms.

Start your research with Wikoscope


The browser plugin Unpaywall (Chrome or Firefox) will skip paywalls and redirect you to an Open Access PDF of an article if available. Once installed just look for the green lock while browsing articles.

If you want to see which of your publications can be made accesible according to Open Access policies check out

If you have questions regarding Open Access in general or your publications in particular get in touch with us. We have prepared an overview for you.