Theological libraries provide many different types of resources to assist in educating and promoting the study of theology and religion. These libraries assist students, faculty, staff, and researchers through the use of primary and secondary sources to advance their knowledge of religion and theology to better understand its impact upon the world. Within the category of theological libraries, the variety of resources housed within each institution varies depending upon its needs and its researchers’ needs. Some theological libraries are archival repositories for the historical collections of religious group(s) while other theological libraries specialize in more contemporary resources (books, videos, journals, etc.) to support theological and religious research. Because of the rarity of some of the archival collections and rare books housed within these repositories, the lending and use policies for each library varies greatly contingent on the type of institution where the library is housed.