The Law Library of Congress is the law library of the United States Congress. The Law Library of Congress holds the single most comprehensive and authoritative collection of domestic, foreign, and international legal materials in the world. Established in 1832, its collections are currently housed in the James Madison Memorial Building of the Library of Congress. Law staff rely on and utilize 2.9 million volumes of primary legal sources, 102.18 million microforms, 99,000 reels of microfilm, 3.18 million pieces of microfiche, and 15,600 tangible electronic resources (CD-ROMs and other disks), making it is the largest law library in the world.