The New Schaff-Herzog Encyclopedia of Religious Knowledge is a well-known reference work for Christianity. This encyclopedia was originally an English adaptation of German theologian Johann Jakob Herzog's "Realencyklopadie fur protestantische Theologie und Kirche." The adaptation began under the leadership of Philip Schaff, but since then has seen the contributions of over 100 editors and 600 scholars. It is the most comprehensive, detailed, and significant encyclopedia for the Christian religion in the English language. It covers a wide range of topics, including church history, comparative religion, geography, doctrinal theology, archeology, and biblical studies. A powerful reference tool, the New Schaff-Herzog Encyclopedia of Religious Knowledge contains thousands of entries, which are concise but highly informative. Ideal for learning about unfamiliar terms and ideas, these volumes are an indispensable resource.