230-280 - Christianity
- 235.2082 - Women saints--Christian--doctrines
248.82-248.85 - Guides to Christian life for specific age groups
260 - Christian organization, social work & worship
- 262.1082 - Women clergy--Christian--ecclesiology
270 - History of Christianity
- 270.082 - Women--religion--Christianity
- 270[.093] - Ancient world
- 270.1 - Apostolic period to 325
- 270.2 - Period of ecumenical councils, 325-787