gave the bawn and gate house to the Hamiltons and commissioned a replacement gate house to better match the main castle. The Baron added Hamilton to his surname just before marrying his distant cousin Hariot Georgina Rowan-Hamilton, daughter of Archibald Rowan-Hamilton, in 1862. 20th century The castle came under attack by the Irish Republican Army during the troubles of the 1920s. Gawn Rowan Hamilton has said: "I have a cutting from the Belfast Telegraph which tells the story of my great-great uncle being woken at 2 am and exchanging gunfire from the battlements, which was terribly exciting." Architecture The architecture of the castle has no traces of an Irish tower house or castle. Benjamin Ferrey created a baronial gatehouse to match the two surviving corner towers to the castle. Lanyon's imposing doorcase was a celebration of Rowan-Hamilton's access through their front door for the first time in almost 200 years. The heavy plasterwork is by Mr. Fulton. Drawing room, dining room and library interconnect and look south into the garden. Lanyon retained the vaulted rooms in the northern circular tower and the pentagonal rooms in its Georgian counterpart. He re-encased the entire exterior while respecting the original fenestration. At roof level he provided a flurry of candle snuffers. References Castles in County Down Grade A listed buildings Register of Parks, Gardens and Demesnes of Special Historic Interest Killyleagh