10th C. – Antrim Round Tower, Co. Antrim
Described as one of the most perfect of the round towers of Ireland, 93 feet high and 50 feet in circumference at the base.
1180 – Carrickfergus Castle, Co. Antrim
One of the finest Norman castles in Ireland, Carrickfergus Castle is sited along the harbour front, controlling the seashore. Probably constructed by John de Courcey sometime around 1180,
1193 – Grey Abbey, Greyabbey, Co. Down
Grey Abbey was founded in 1193, by John de Courcy’s wife, Affreca as a daughter house of Holmcultram Abbey in Cumbria.
13th C. – Drumlane Priory, Co. Cavan
The remains of a 13th century church and round tower. St Mary’s Priory was established here on the northern banks of Garfiney Lough in the 12th century for Augustinian Canons.
13th C. – Round Tower, Devenish Island, Co. Fermanagh
There are extensive low earthworks on the hillside, but the earliest buildings are St Molaise’s House and this fine round tower close by,
1474 – Donegal Castle, Co. Donegal
The castle consists of a 15th century rectangular keep with a later Jacobean style wing. The complex is surrounded by a 17th century boundary wall,
1533 – St. Columbs’s Cathedral, Derry
Described in ‘Tours in Ulster a hand-book to the antiquities and scenery of the north of Ireland’, published in 1854. –
1600s – Blayney Castle, Castleblayney, Co. Monaghan
The area of Muckno and Ballynalurgan was granted to Sir Edward Blayney under the Plantation of Ulster in 1607 and 1611.
1610 – Belfast Castle, Belfast, Co. Antrim
John de Courcy built a castle on what is now Castle Street in the city centre in the 12th century. By the early 17th century when Sir Arthur Chichester,
1611 – North Gate, Carrickfergus, Co. Antrim
Lord Deputy Sir Arthur Chichester enclosed Carrickfergus with stone walls from 1611 onwards and more than half the circuit is still visible,
