Tsinghua University Library was established in 1912. Today it boasts a collection of 3.5 million volumes, focusing on science and technology, the humanities, the social sciences, and management. Its printed collection includes 4,000 current periodicals and 400,000 bound periodicals, over 30,000 Tsinghua dissertations and theses, and much more. The library's special collections include: 300,000 thread-bound ancient books; rubbings from inscriptions on ancient bronzes and stone tablets; electronic resources, including several important web-database mirror sites; nearly 3,000 monographs, including special manuscripts and videotapes donated by the faculty members and alumni of Tsinghua University. The library is a proud part of the worldwide Digital Library Project.