The Library has both the online version and earlier print version of the Dictionary of Art, published by Grove and Oxford University Press. It is commonly referred to as either Grove Art or Oxford Art Online (there are additional sources in the online version). The online version does have a limit of five simultaneous users, so you may be denied access when you try to use it. Either try again later, or use the print version located on the 3rd floor of the library. The call number can be found by clicking on the title.
To find books in the Berry Library and other local libraries use the SSU/Noble Library Catalog. To request books from other libraries in the system, click on the book title, and then the Place Hold button.