Library of Congress Home page of the Library of Congress.

MELVYL Consolidated online catalogue of the University of California libraries. Superb.

LIBRARY HUB DISCOVER (formerly COPAC) Consolidated online catalogues of some 150 British and Irish national, academic, and specialist libraries.

Die Digitale Bibliothek Online catalogues of German research libraries and databanks, with links to some major online library catalogues worldwide. Instructions primarily in German. Click on “Alle Standorte” for widest possible search.

Peraldus Alain Nadeau’s collection of bibliographical references to more than 37,000 medieval manuscripts in some 1,580 libraries worldwide.

Medieval Libraries of Great Britain This website brings together two standard research tools for medieval British libraries: (1) Neil Ker’s Medieval Libraries of Great Britain, which lists, by its modern shelf-mark, every manuscript that bears evidence of its institutional home in the middle ages, and (2) the Corpus of British Medieval Library Catalogue, ed. Richard Sharpe, which prints medieval book-lists. In progress.

• British Library: Catalogues of manuscripts and archives See also the British Library’s consolidated Catalogue of Archives and Manuscripts.
• British Library: New catalogue of Cotton MSS Compiled by Dr Nigel Ramsay in 1990-97 to supplement and update the original Cotton MSS catalogue published by Joseph Planta in 1801. Includes a partial bibliography of publications of manuscripts in the collection.

Bodleian Library, Oxford: Manuscripts and Rare Books Includes online catalogues for the Bodleian’s electronic catalogue of medieval and Renaissance manuscripts. For a few collections (e.g., MSS Lat.), there is an online handlist of manuscripts; for most collections, there are merely references to printed catalogues and a brief history of the collection.

Bodleian Library, Oxford: Images from Manuscripts Browsable selection of images, 11th-17th cent., arranged by century and country of origin.

Early Manuscripts at Oxford University A selection of medieval and early modern manuscripts, scanned from the collections of the Bodleian Library and of six college libraries.

NEWTON: Online catalogues of Cambridge University libraries Includes separate catalogues for CUL and individual college libraries.

Medieval and Modern Thought Digitization Project This project, based at Stanford University, is digitizing a wide range of printed sources, including some of the catalogues of manuscripts in Oxford and Cambridge college libraries.

Vatican Library Home page of the Biblioteca Apostolica Vaticana. Includes an online catalogue (in Italian and English) of both manuscripts and printed books.

LibDex  Alphabetical index to libraries around the world.

North American libraries containing pre-1600 manuscripts Lists of institutions in Canada, the US, and Puerto Rico that own pre-1600 manuscripts. (This valuable website of the UMCC [Uncatalogued Manuscripts Control Center] disappeared with AOL, but an archived version is available at: http://web.archive.org/web/20070607000900/http://members.aol.com/dericci/umcc/pil.htm).

Medieval manuscripts in North America: changes in ownership Collections that have changed hands since the publication of de Ricci’s Census of Medieval and Renaissance Manuscripts in the United States and Canada and the Supplement by Faye and Bond. Posted by the Uncatalogued Manuscript Control Center (formerly known as the Union Manuscript Computer Catalogue). (This valuable website of the UMCC disappeared with AOL, but an archived version is available at: http://web.archive.org/web/20070610141405/members.aol.com/dericci/umcc/newlocations.htm. See also the archived pages from the same website of private collections in De Ricci’s Census and Faye and Bond’s Supplement, and untraced manuscripts.)

C. W. Dutschke, Guide To Medieval and Renaissance Manuscripts in the Huntington Library Online version of the Huntington’s printed catalague, which describes 390 medieval and renaissance manuscripts in Latin script. In general, documents, fragments, and books in non-Latin script are excluded. For documentary material, see the printed Guide to British Historical Manuscripts in the Huntington Library (San Marino, 1982).

Lawrence J. Schoenberg Collection of Manuscripts The late Lawrence J. Schoenberg’s collection (primarily late medieval and early modern manuscripts) is now housed in the Schoenberg Institute for Manuscript Studies (SIMS) at the University of Pennsylvania. There is a .pdf “checklist” of the manuscripts in the collection, to which a hotlink is available on this page. There is also an online version of the catalogue published in 2006 by Christopher de Hamel.

Schoenberg Database of Manuscripts Database of medieval manuscript books of five or more folios produced before 1600, and their provenance.

Seymour de Ricci Bibliotheca Britannica Manuscripta Digitized Archive Searchable database containing the digitized notes of the historian and bibliographer Seymour Montefiore Robert Rosso de Ricci (1881-1942) made for the compilation of his unfinished Bibliotheca Britannica Manuscripta. This project was intended as a companion work to his Census of Medieval and Renaissance Manuscripts in the United States and Canada, published between 1935 and 1940. De Ricci’s notes, compiled in thirty-four boxes containing over 60,000 index cards and originally bequeathed to the Institute for Historical Research in London, are currently housed in the Senate House Library at the University of London. In collaboration with the Senate House Library, the Schoenberg Center for Electronic Text and Image has made this valuable resource available online in downloadable pdf files. The cards are arranged by individual Collectors (listed by last name) and Repositories (by town, institution, or college).

Handschriftencensus Detailed handlist of medieval manuscripts in the German language, including information about modern editions. Arranged in alphabetical lists of authors/titles and repositories. In progress.

Münchener Digitalisierungs Zentrum/Digitale Bibliothek Portal for digital library sites, including medieval manuscripts and incunabula such as Druckgraphische Buchillustrationen des 15. Jh (illustrations from 76 German incunabula, searchable by volume [results in German only] and by topical alphabetical index [in both German and English]).

Repertorium Chronicarum: A Bibliography of the Manuscripts of Medieval Latin Chronicles This project, directed by Dan Embree, attempts to record the location of every known manuscript of every known Latin chronicle of the Middle Ages. Searchable by author, title, city, and library. In progress.

Voigts-Kurtz Search Program: Indexes to medieval scientific and medical writings in Latin and English Searchable indexes of (1) Lynn Thorndike and Pearl Kibre, A Catalogue of Incipits of Mediaeval Scientific Writings in Latin (1963) and supplements; and (2) an expanded and revised version of Linda Ehrsam Voigts and Patricia Deery Kurtz, Scientific and Medical Writings in Old and Middle English: An Electronic Reference (CD, 2000).

ORB: On-Line Reference Book for Medieval Studies Includes online sourcebook, encyclopedia, and bibliographies.

Royal Historical Society, consolidated Annual Bibliographies of British and Irish History More than 445,00 entries. Accessible to subscribers only.

Medieval English Towns Large, useful website. Includes a Medieval English Urban History Bibliography.

History theses in the UK Searchable database of completed and in-progress doctoral theses and M.A. dissertations at universities in the UK, provided by the Institute of Historical Research.

Teachers of History in the UK and the Republic of Ireland Searchable database, provided by the Institute of Historical Research.

Theses Canada Search AMICUS, Canada’s national online catalogue, for bibliographic records of all theses in the National Library of Canada theses collection (established 1965); access for free the full-text electronic versions of Canadian theses and dissertations that were published from the beginning of 1998 to August 31, 2002.

History dissertations, US and Canada Searchable database of doctoral dissertations completed and in progress at American and Canadian universities. Provided by the American Historical Association.

Bibliography of Roman, medieval and early modern wills and probate inventories Word-searchable bibliography of printed wills and inventories and testamentary studies, alphabetized by title, rather than author. Covers Western Europe.

Stuart Jenks’s Magazine Stacks Searchable collection of tables of contents of dozens of German and English medieval history journals, covering thousands of volumes. An outstanding resource.

ILEJ: Internet Library of Early Journals Searchable, browsable collection of 18th- and 19-century English journals, including The Gentleman’s Magazine and Notes and Queries.

English Medieval Legal Documents, AD 600- AD 1535: A Compilation of Published Sources A collaborative database on the published sources of English medieval legal documents, with links to online sources. At the University of Southern California.