| title | creator | language | description | tableOfContents | contributor | subject | created |
| Orthodoxy | Chesterton, G. K. (Gilbert Keith), 1874-1936 | en | Companion to Heretics | | | Apologetics; Chesterton, G. K. (Gilbert Keith), 1874-1936; Religion -- History -- 20th century; Christianity -- Essence, genius, nature | 1994-05-01 |
| Orthodoxy: Its Truths And Errors | Clarke, James Freeman, 1810-1888 | en | | | | | 2009-06-06 |
| Saint Athanasius
The Father of Orthodoxy | Forbes, F. A. (Frances Alice), 1869-1936 | en | | | | Athanasius, Saint, Patriarch of Alexandria, d. 373; Christian saints -- Biography | 2009-01-05 |
| Orthodoxy | Chesterton, G. K. (Gilbert Keith), 1874-1936 | en | | | | Chesterton, G. K. (Gilbert Keith), 1874-1936; Religion -- History -- 20th century; Apologetics; Christianity -- Essence, genius, nature | 2005-09-28 |