| A Castilian-Regalist cradling : Spanish-Habsburg formation of the early Irish Counter Reformation | Downey, Declan M. | Article in Book | | 2006 |
| A Salamancan who evaded the Inquisition : Florence Conry, pro-Hapsburg archbishop, diplomat and controversial theologian, c.1560-1629 | Downey, Declan M. | Article in Book | | 2008 |
| Accommodations with the Protestant state and church : a comparative study of respective Dutch and Irish Catholic experiences | Downey, Declan M. | Article in Book | | 2011 |
| Agostiniani e Scotisti : il contributo irlandese alla teologia della Controroforma nell'Europa continentale | Downey, Declan M. | Article in Book | | 2001 |
| Augustinians and Scotists : the Irish contribution to Counter-Reformation theology in continental Europe | Downey, Declan M. | Article in Book | | 2002 |
| Between Scylla and Charybdis : the Knights of Glin and their Habsburg and Stuart associations, 1600-1700 | Downey, Declan M. | Article in Book | | 2009 |
| Continuity, legitmacy and strategy : the titular priors of Ireland - Romegas, González, Wyse and Brochero - and their relations with the Spanish monarchy, 1576-1625 | Downey, Declan M. | Article in Book | | 2015 |
| Culture and diplomacy. The Spanish Hapsburg dimension in the Irish Counter Reformation movement, c.1529-c.1629 | Downey, Declan M. | Thesis | | 1994 |
| Die Wildgänse und der Doppeladler : Irische integration in Österreich von 1630 bis 1918 | Downey, Declan M. | Article in Book | | 2003 |
| Dr Patricia O Connell : an appreciation | Downey, Declan M. | Article in Book | | 2008 |
| Habsburgism among the Gaelic Irish and the Dutch Catholics, c. 1559 - c. 1669 | Downey, Declan M | Thesis | | 1988 |
| Insights into Kerry and the Habsburg Imperium, c.1500-c.1800 | Downey, Declan M. | Article in Book | | 2020 |
| Irish-European integration : The legacy of Charles V | Downey, Declan M. | Article in Book | | 2003 |
| La Paz de Westfalia, vista desde Irlanda | Downey, Declan M. | Article in Book | | 1999 |
| Pietas Austriaca and ‘Dispensers of Royal Authority’: The early Irish Colleges and Habsburg cultural strategies | Downey, Declan M. | Article in Book | | 2018 |
| Purity of blood and purity of faith in early modern Ireland | Downey, Declan M. | Article in Book | | 2005 |
| Some observations on the parallels concerning Ireland and India's respective experiences of imperial withdrawal | Downey, Declan M. | Article in Book | | 2001 |
| Spanish-Irish relations through the ages | | Monograph or Collective Volume | Four Courts | 2008 |
| The crisis in Christianity, 1450-1600 | Downey, Declan M. | Monograph or Collective Volume | National Distance Education Council | 2003 |
| Whether Habsburgs or Bourbons: some reflections on the alignments of nobles of Irish origin in the war of the Spanish succession, 1713-1723 | Downey, Declan M. | Article in Book | | 2010 |
| Wild geese and the double headed eagle : Irish integration in Austria, c. 1630-c.1918 | Downey, Declan M. | Article in Book | | 2002 |