The Theologische Realenzyklopädie (TRE) [Theological Encyclopedia] is a modern specialist encyclopaedia comprising 36 volumes of text (1976-2004) representing the present state of theological research as a whole. More than a generation of scholars have collaborated in its production, to create a unique internationally-oriented reference work containing more than 2,500 articles (on over 28,000 pages of text) which stands as a document of the history of scholarship. The TRE is an indispensable tool for research, study and teaching, principally in theology, but also in its neighbouring disciplines such as history, philosophy, Jewish studies and religious studies.
TRE is also available as paperback edition
Aaron - Katechismuspredigt (17 volumes)
Katechumenat/Katechumenen - Publizistik/Presse (10 volumes)
Pürstinger - Zypern (9 volumes)
Gesamtregister (Bibelstellen, Orte, Sachen, Namen - 2 volumes)
Further there is an online resource Theologische Realenzyklopädie Online.
"These volumes signal the completion of a massive thirtysix volume theological encyclopedia, thirty years in the making. They are comprehensive indexes of one of the most significant reference works of the last century. Four separate indexes comprise the two volumes: place references, subjects, biblical texts (including apocryphal and deuteroncanonical literature), and personal names. The amount of material contained in each index is staggering, giving readers an indication of the encyclopedia s depth and breadth. Perusal of the volumes reveals a European orientation, both in names and places, although the subjects also include plentiful references to the global South. This compact study edition is essential for optimum use of the encyclopedia itself. Every theological library should have a copy." (David H. Jensen in Religious Studies Review 3/2010)