The Holy Rood was last exposed for public veneration in 1632 and following the Cromwellian conquest of Ireland, Holy Cross Abbey fell into ruins. Local people used the roofless ruins as a burial place after 1740. It became a scheduled national monument in 1880, with orders that the ruins were, "to be preserved and not used as a place of worship".
Special legislation in the Dáil for the founding's 500th anniversary, 21 January 1969, enabled Holy Cross Abbey to be restored as a place of Catholic worship, exceptionally for a national monument. The Sacristan of St. Peter's Basilica in the Vatican provided an authenticated relic of the Holy Cross, and the emblem of the Jerusalem Cross, or Crusader Cross, has been restored for the Abbey.[4]
Two crosses were stolen, including the cross containing the relics of the true cross, in a robbery on the Abbey on 11 October 2011. A portable angle grinder, hammer, and screwdriver were used by the masked raiders to remove the relics.[5] In January 2012, it was announced that the relics had been recovered by An Garda Siochana, relatively undamaged, and returned to the Abbey.[6]
^Holy Cross Abbey from The Catholic Encyclopedia, Volume VII. Published 1910. New York: Robert Appleton Company. Nihil Obstat, 1 June 1910. Remy Lafort, S.T.D., Censor
^The Life of Hugh Roe O'Donnell, Prince of Tyrconnell (Beatha Aodh Ruadh O Domhnaill) by Lughaidh O'Cleirigh (original Gaelic manuscript in the Royal Irish Academy in Dublin), translated with notes by Rev. Denis Murphy, S.J., M.R.I.A., and published by Sealy, Bryers, & Walker, Dublin, 1893 (pages 304-307)
^Holy Cross Abbey, by Thomas Morris, Irish Heritage Series, no. 55, published by Eason & Son Ltd, Dublin 1986. ISBN0-900346-75-2