Schaff-Herzog Encyclopedia of Religious Knowledge

The Schaff-Herzog Encyclopedia of Religious Knowledge is a religious encyclopedia (1st edition 1882-84; 3rd edition 1891; new edition published in thirteen volumes 1908-14). It focuses on Christianity from a primarily Protestant point of view.

Edited by the Reverend Philip Schaff (1819-1893) in its English language version, it was based on editions of the Realencyklopädie für protestantische Theologie und Kirche founded by Johann Jakob Herzog (1805-1882). The new edition was a substantial update on the earlier text, being based throughout on the 3rd edition of the Realencyklopädie, edited by Albert Hauck.

As of 2004, the 1914 text is in the public domain (and thus can be incorporated into any other work). The Christian Classics Ethereal Library has digitised the work, and made it available to be read online. Logos Bible Software is also undertaking a digitization project of the work.