| An unusual souvenir of the Boer War. | Callaghan, Stephen | Article in Journal | | 2019 |
| Birr military cemetery : a history of the cemetery and those interred there | Callaghan, Stephen | Monograph or Collective Volume | Offaly County Council, Heritage Office | 2020 |
| Bully’s Acre – A history of Birr’s forgotten cemetery | Callaghan, Stephen | Monograph or Collective Volume | Offaly County Council | 2024 |
| Disbandment, destruction and commemoration. The Leinster Regiment, their depot and how they were commemorated in Birr, Co. Offaly | Callaghan, Stephen | Article in Journal | | 2022 |
| Great War memorials in the Church of Ireland churches of County Offaly | Callaghan, Stephen | Article in Book | Esker Press | 2018 |
| Great War training trenches at Birr Barracks : a rehearsal ground for Kitchener’s new army | Callaghan, StephenMontgomery, HeatherShine, Denis | Article in Journal | | 2020 |
| Heart and soul : a history of Saint Brendan's graveyard in Birr | Callaghan, StephenO'Brien, Caimin | Monograph or Collective Volume | Offaly County Council | 2016 |
| Rehearsing for the theatre of war | Arrigan, BrendanCallaghan, StephenGreen, AshleyShine, Denis | Article in Journal | | 2019 |
| The military burials and memorials at Birr: From the pyramids of Egypt to the beaches of Normandy | Callaghan, Stephen | Article in Journal | | 2013 |