Fathom Castle, Medieval fortress in County Armagh, Northern Ireland
The stone structure stood near Newry, positioned along the western approach to Carlingford with defensive walls overlooking the surrounding countryside.
Hugh DeLacy controlled the land initially before Shane O'Neill constructed his residence in the 1550s, which remained under O'Neill clan control until English forces seized it.
The castle represented Norman influence in Ireland, marking the territory controlled by the Marmion family who maintained local governance from the 12th to 17th centuries.
The castle site was demolished in 1730 during canal construction works, with historical documentation available through maps at the British Library from 1602.
The fortress carried multiple names throughout history, including Feedom Castle and Fidun Castle, meaning 'the fort in the Forest' in local terminology.
GPS coordinates: 54.04010,-6.18630
Latest update: March 25, 2025 13:11
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