The first place to start looking for books is BobCat, NYU's online catalog, which includes records for materials held in the following NYU Libraries of likely interest to those in Medieval & Renaissance Studies: Elmer Holmes Bobst Library; IFA Stephen Chan Library & Conservation Center Library; Institute for the Study of the Ancient World Library; and the libraries of New School and Cooper Union
The holdings of NYU's Law Library, Medical and Dental Libraries are not listed in BobCat. Their catalogs are listed below.
Other Local Catalogs
The following are catalogs of other libraries at NYU and in the New York area that may be useful to those studying the Middle Ages and the Renaissance.
If you don't find a book in BobCat, and it's not convenient to visit one of the other New York area libraries listed above, the best next step is WorldCat - an international database listing the holdings of more than 10,000 libraries.
Beyond WorldCat, the following catalogs can be of use to those studying the Middle Ages and the Renaissance: