Upon the northern shore of Carlingford Lough, in the Barony of Mourne, four and a half miles south-west of Kilteel, County Down, are situated the ruins of this castle. It is a very fine specimen of Norman architecture, and was erected soon after the landing of the first English settlers so as to secure communication between the Pale and the outlying district of Lecale, as well as to command the entrance to Carlingford Lough.

At present the remains chiefly consist of the keep, which was a high rectangular building, with square towers at the angles. A winding stair in the south-west turret leads to the top. The stone floor of the great hall, measuring 70 feet by 40, is supported by arches which form vaults in the basement. The upper floors have disappeared, and were probably of wood.

The traces of extensive outworks can be seen round the building. On the west side stands a house which is at present inhabited by a farmer, but which for many years formed the chief residence of the Bagnall family during the seventeenth and eighteenth centuries.

The castle belonged to the Du Burgos or Burkes, Earls of Ulster, and in 1312 Sir Maurice, the son of Thomas, married Catherine, daughter of the “Red Earl” of Ulster, and the next day, being the 16th of August, Thomas, the 2nd Earl of Kildare, “a prudent and wise man,” married her sister, Lady Joan de Burgh, also in the castle. The Lady Joan had two other married sisters, one being the

wife of King Robert Bruce, and the other Countess of Desmond.

In 1335 there was an order to send six “balistas” to furnish “Viride Castrum,” or the Greencastle. The same year William de Logan was ordered to pay Henry de Maunderville 20 marks out of the rents of the late Earl of Ulster, which were in the King’s hands, on account of the minority of the heir. This reward was for De Maunderville having twice relieved the castle of Greencastle with men-at-arms when it was besieged by the “felons” of Ulster.

It was again attacked by the Irish in 1343, and this time it was carried by storm and dilapidated, but was shortly afterwards restored.

The late Constable, William de Doun, received pardon in 1356 for having seized and imprisoned Rosea, daughter of Richard Foy.

During Henry IV.’s reign there was only one constable between the castles of Carlingford and Greencastle. It is reported that Stephen Geron received £20 a year for the guardianship of Greencastle and £5 for Carlingford.

In 1403 John Moore, who was then constable, petitioned for a rise of salary, and he was granted £40 a year on condition he spent 10 marks of it on repairs. The amount was to be paid out of the rents of Carlingford, Cooley, and “le Mourne.”

None but Englishmen were permitted to hold the appointment in 1495.

Notwithstanding this, when M’Donell made his submission in 1542 he requested to be granted Greencastle, and the lands lying waste around it, for which favour he promised military service.

The Government did not evidently see their way to accede to his request, and seven years later it is reported that the fortress was in a “wretched condition.”

In 1552 it was granted to Sir Nicholas Bagnall, in whose family’s possession it remained for many years.

Sir Arthur Chichester was granted means to provide ten warders for Greencastle in 1612, but this does not seem to have interfered with the Bagnall possession, as in 1620 Arthur Bagnall held the manors and lordships of Greencastle and Mourne.

Three years later it is recommended that the ward be moved from Culmore to Greencastle, and the stronghold was garrisoned during the rebellion of 1641.