Theologische Realenzyklopädie

The Theologische Realenzyklopädie (TRE) is a German encyclopedia of theology and religious studies.

The Theologische Realenzyklopädie is published by Walter de Gruyter and continues the nineteenth-century tradition of specialized encyclopedias, specifically that of the Realenzyklopädie für protestantische Theologie und Kirche [de], published in Leipzig between 1896 and 1913.

But in contrast to the latter, the TRE treats its subjects in an ecumenical fashion.

The TRE was edited by fourteen main editors.

Until volume 12 his fellow main editor was Gerhard Krause, professor of theology at the University of Bonn.