Name Image Location Type Date Notes Late 18th century Built on top of the row of 15th century warehouses that most of the other castles in Ardglas were built to protect, Ardglass Castle is a manor house built by around . Since , it forms part of the Arglass Golf Club's course as the Club House. Parts of the original structure, namely walls, still stand towards the east end of the property. 15th century Audley Castle is a 15th-century bawn constructed by its namesake the Audleys on a rocky hill 1.6 kilometres (0.99 mi) from . In , the tower passed into the keeping of the Wards of Castle Ward. In the 18th century the tower was incorporated into the parks of the Castle Ward estate. The tower remains standing though the bawn is largely ruined. 16th century built the tower house as his residence in around , on the site of Newry's medieval abbey. It remained in his family until the 18th century, after which it was altered, and it became part of a bakery in . The significance of the building was only noted in after the bakery closed; it has since been restored and now houses the Newry and Mourne Museum. Country house Robert Edward Ward had the house constructed in to replace a 17th-century building on the site. The architect was probably , with having designed the separate stables building. It was the home of in the early 20th century, and on the death of his widow in the estate was bought by Bangor Council. The house has served as Bangor Town Hall since 1952. Tower house 15th–16th centuries Built in the late 15th or early 16th century, the castle may have been demolished by in . Only the eastern half remains standing. Country house A Scottish baronial castle built by the family between and . It is located in and is now used as a Christian conference centre. 11th century A small motte and bailey castle built by John de Courcy 11th century following the in timber and earth with some stone. Though it has fallen into ruin, Clough Castle is today one of the best preserved examples of a Motte and Bailey in Ireland. or Choud Castle 15th–16th centuries Located across the street from Margaret castles stands Cowd castle, a small two-story tower house built in either the late 15th or early 16th centuries as part of a larger structure built with the intention of protecting the local area and its trade. In , demolished much of that structure castle for his mansion, . 13th century Dundrum Castle (not to be confused with 's ) was built by after his invasion of to control access to from the west and the south. It was built upon a tall, rocky hill and thus commands fine views of the and , and the lands west towards and the plains of Lecale to the east. Dundrum castle has undergone several modifications such as the round keep added by , its current lopsided design from 's second term as , and the that was built by the family in the late 15th century. The castle was demolished in . Dundrum is a . Castle c. Greencastle is a 15 and 16th century castle built on the site of a possibly built by Hugh de Lacy in the 13th century. Local folklore also has it that John de Courcy was married here. The castle served as an English garrison in Northern Ireland for several hundred years before soldiers subjected it to destruction by artillery fire to prevent its usage by Irish rebels. Country house 1770s A Georgian manor house owned the that served as the resident of the until and now serves as the official residence of the as well as the official residence of the Queen in . Hillsborough Castle and the (at that time) village of Hillsborough were constructed in the 1770s , the first , for the Hill family and was in the keeping of the Hill family until 1922. Tower house 15th century Jordan's Castle is a rectangular, four story tall tower house in Ardgrass, County Down. Built by Simon Jordan to defend against the for three years until he was relieved by in . In , Belfast Francis Joseph Bigger bought the castle, restored it and used it to display his extensive collection of antiquities and made it freely accessible to everyone to bring local people "in touch with the Irish past, and give them some conception of the historic background of their life." Tower house 12th century Easily the largest medieval structure in Ardglass, King's Castle is a tower house originally built in the 12th century and modified extensively in following centuries. Was rebuilt in the 19th century and reopened as a , which it remains even today, following a collapse of the building in after failed attempts to repair the foundation of the building. Tower house – The oldest known tower in , having been erected in the window of time from to and probably by John Sely, , Kilclief Castle is very similar in construction to Jordan's Castle and is notably less ruined. Later, the building was garrisoned by 11 English soldiers during the Irish Nine Years' War from to . Castle In its current presentation, Killyleagh Castle is as Sir designed it: a style built in the mid 18th century. Possibly one of the oldest continuously inhabited castles in , Killyleagh Castle was first constructed by Norman knight John de Courcy in , one of many such fortifications to protect the Strangford Lough against incursion. Since its early beginnings, the castle has been important to the history of the local region (County Down), having a pivotal role to play in events from local lords in the fighting against English rule, local fighting against the English connected to the fall of the Stuarts, and even local combat against the in the 1920s. A three story tall tower house and bawn built by Roland Savage, a Norman landlord, on the site of a 9th-century tower in (thus predating the ). The tower was occupied until it was abandoned and left to decay until its purchase and renovation by a "Colonel Johnston" and some further modification still in by a "Montgomery of ." It was abandoned once again in , but was opened to the public once more in by the . Tower house Is a ruined tower house near on by an English soldier named Captain Thomas Browne. Later, it fell into ruin after being abandoned in the early 17th century until its partial renovation in by a H.C. Lawlor and the . Tower house 15th century Margaret's Tower is one of six ruined tower houses built to protect the warehouses that used to stand in Ardglass that possibly stood 3 stories tall and is thought to have been built in the 15th century. Bawn
1560s A famous bawn constructed some time in the 1560s on the site of an old Norman keep built by the first in in order to impede attacks on the river city of . Narrow Water Castle was also the site of the infamous on 27 August , wherein the detonated two bombs that killed 18 English army soldiers. Tower house 16th century A small tower house built by William Le Savage in the 16th century overlooking the harbor. It has seen little to no change in its form over the years. Castle Quintin castle is one of the very few Anglo-Norman castles still occupied in Ireland. The castle was built in on the orders of John de Courcy and later occupied by the , who would add some small additions to the castle. This cycle would continue through the ages all the way to now. Tower house 16th century A small tower house located 1.5 miles (2.4 km) from Downpatrick on the east bank of the that was inhabited into the late 18th century. Tower house 12th century A tower house on Sketrick Island near Whiterock thought to have built in the 12th century that was acquired by Sir Robert Savage in the 14th century. The record the capture and turning over of the castle in by an army led by the O'Neills to . It was intact until when a storm demolished much of it. Mid 19th century Stormont, a mansion built in the mid 19th century, is one of the primary governmental buildings in . Stormont Castle has been the official residence for those who didn't decide to live in and the location of the Cabinet Room of the from to . Before devolution it was the Belfast headquarters of the , Ministers and their supporting officials. During the , it was also used as a base by officers. Tower house 15-16th centuries An intact tower house built on a hill overlooking the town of Strangford. Although almost all of the castle corresponds with 16th century Irish architecture, the tower house's door seems to indicate that the current incarnation of the tower is simply a remodeling of an earlier 15th century tower house. Strangford was once used as a set for Winterhold in the popular , . Tower house Tower house 1760s An 18th century property located 1.5 miles (2.4 km) from the village of that overlooks the . The castle has been the home of the Ward family since about , though the modern structure was built for by an unknown architect, possibly and individual with ties to the Wards or . On 10 February , Leonard O'Hanlon (aged 23) and Vivienne Fitzsimmons (aged 17), both members of the , were killed in a premature bomb explosion in the grounds of Castle Ward estate.