Since their foundation, the WCC Archives and Library have had as their mission to serve as a place for ecumenical study and research and to preserve the historical memory of the ecumenical movement. They provide information resources on the history of ecumenism from its beginnings in the early 20th century to today, to students, faculty, researchers, WCC staff, and visitors, thus furthering ecumenical theological education and research on site and globally.
The WCC Archives, housed at the Ecumenical Centre in Geneva, preserves the records of the World Council of Churches as well as of various other ecumenical organizations or movements and of personal papers of ecumenical personalities. The collection contains paper documents, photographs, sound tapes, films and videos, representing some 2,000 running meters.
The WCC Library, housed at the Ecumenical Institute in Bossey, holds about 100,000 volumes and 900 periodicals, constituting a unique collection on ecumenism and the history of the ecumenical movement, as well as further collections in areas such as biblical hermeneutics, social ethics, missiology, contextual theology, and interfaith dialogue.