201 Religious mythology & social theology
201.4 General classes of religion
Theological Commons – from Princeton Theological Seminary – a digital library of over 110,000 resources on theology and religion. It consists mainly of public domain books and also includes periodicals, audio recordings, photographs, manuscript collections, and other formats.
203 Public Worship & Other Practices
204 Religious Experience, Life, & Practice
205 Religious Ethics
206 Leaders and Organizations
206.1 Sermon Preparation
PreachingandWorship.org – Curated resources for preachers.
207 Missions & Religious Education
209 Sects & Reform Movements
210 Philosophy & Theory of Religion
220 The Bible
Bible.org – Where the world comes to study the Bible.
240 Christian Practice & Observance
250 Christian Pastoral Practice & Religious Orders
260 Christian Organization, Social Work, & Worship
270 History of Christianity
280 Christian Denominations
290 Other Religions