Museum libraries are libraries within museums. Like any other special library, museum libraries have aspects of traditional libraries, but also contain other characteristics unlike public or academic libraries. Museum libraries are often associated with a public museum or institution whose main purpose is to provide historical and educational information to the general public. Unlike traditional libraries, many museum libraries are more private and hidden from the public eye due to their main purpose as a research library for museum staff and professional researchers. Because of this, users must often make appointments and be allowed special access through them by library staff or other museum staff. Though this is not to say all museum libraries are unattainable to public users. Museum libraries such as the Ryerson & Burnham Libraries of the Art Institute of Chicago, the Nolen Library of the Metropolitan Museum of Modern Art of New York, and the Museums Victoria Library in Melbourne, Australia all provide access to public during opening hours.