| A 13th-century hall house at Clohaskin, Co. Tipperary | O'Brien, Caimin | Article in Journal | | 1994 |
| Excavation of an early 17th-century glassmaking site at Glasshouse, Shinrone, Co. Offaly, Ireland | Farrelly, JeanFenwick, JoeGould, MalcolmMcCann, WilliamMeenan, RoseanneO'Brien, CaiminPaynter, SarahWillmott, Hugh | Article in Journal | | 2014 |
| Florentia monasteriorum | O'Brien, Caimin | Article in Journal | | 2009 |
| Forest glass furnaces in County Offaly | Farrelly, JeanO'Brien, Caimin | Article in Journal | | 1997 |
| Heart and soul : a history of Saint Brendan's graveyard in Birr | Callaghan, StephenO'Brien, Caimin | Monograph or Collective Volume | Offaly County Council | 2016 |
| New finds from Co. Offaly | O'Brien, Caimin | Article in Journal | | 1994 |
| Painting the past - a reconstruction of the Timber Castle of Lorrha | O'Brien, Caimin | Article in Journal | | 2023 |
| Stories from a sacred landscape : Crogan Hill to Clonmacnoise | O'Brien, Caimin | Monograph or Collective Volume | Offaly County Council|Mercier Press | 2006 |
| Surprising discoveries in County Tipperary | Farrelly, JeanO'Brien, Caimin | Article in Journal | | 1996 |
| Survey of the holy wells in Moycashel barony | O'Brien, Caimin | Article in Book | Geography Publications | 2022 |
| The castle at Ballingarry, County Tipperary : a fourteenth-century Gaelic castles | O'Brien, Caimin | Article in Book | | 2007 |
| The earthwork castles of Anglo-Norman Offaly | O'Brien, Caimin | Article in Book | | 1998 |
| The medieval churches of County Offaly | FitzPatrick, ElizabethO'Brien, Caimin | Monograph or Collective Volume | Government of Ireland | 1998 |
| The origins of the European earthwork castle : north Tipperary, a case study | O'Brien, Caimin | Thesis | | 2001 |