The second floor of Cregan Library (St. Patrick's Campus) houses most print books related to Theology and Religious studies.
Below you will find a list of the most common shelfmarks for these books within the Library.
Use Library Search for online shelf-browsing (Advanced Search with Subject).
The library’s eBook holdings on theology and religious studies can be found via Library Search.
Use the classification guide below for orientation
| Subject | Class number | Subject | Class number | |
| Philosophy & theory of religion | 201-219 | History of Christianity and Christian Church | 270-279 | |
| The Bible | 220 | Christian denominations & sects | 280-289 | |
| Christianity & Christian theology | 230-239 | Other religions | 290-299 | |
| Christian moral and devotional theology | 240-249 | Judaism | 296 | |
| Christian orders and local church | 250-259 | Islam, Babism and Bahai faith | 297 | |
| Social and ecclesiastical theology | 260-269 |