There are a number of library catalogs available to UCLA researchers. The best place to start is with the UCLA Library Catalog.
If you would like to find a book on geographical region, time period, or artist during the Renaissance you can search the library catalog by selecting the basic search option. Once you have the basic search screen in front of you, click on the dropdown box where you see the word keyword and select the "Subject List" option.
Examples of possible subject headings include: