A concerted effort to build The Ohio State University's collection of library materials relating to the history of Christianity began with this three-part assessment. The size of the OSU collection in this subject is compared to that of the collections of four other Big Ten schools. Titles of journals and monographs owned by OSU are checked against lists of titles in published bibliographies and in the Library of Congress. Users are identified, and their needs and perceptions are summarized. Nine recommendations emerge. The project continues for another year.