| Catholic University Church | O'Carroll, Ciarán | Article in Book | | 2012 |
| History of Limerick | | Monograph or Collective Volume | [s.n.] | 1990 |
| Paul Cardinal Cullen : portrait of a practical nationalist : Paul Cullen and his relationship with the Independent Irish Party of the 1850s and the Fenian movement in Ireland of the 1860s | O'Carroll, Ciarán | Monograph or Collective Volume | Veritas | 2008 |
| The Irish Papal Brigade : origins, objectives and fortunes | O'Carroll, Ciarán | Article in Book | | 2014 |
| The papal brigade of St Patrick | O'Carroll, Ciarán | Article in Book | | 2008 |
| The pastoral politics of Paul Cullen | O'Carroll, Ciarán | Article in Book | | 2000 |
| The pastoral vision of Paul Cullen | O'Carroll, Ciarán | Article in Book | | 2011 |