Ireland · Still standing
Hillsborough Castle
Hillsborough Castle is an 18th‑century Georgian country house in the village of Royal Hillsborough in County Down that serves as an official government and royal residence in Northern Ireland. Built for the Hill family and later acquired by the British government, it functions as the Secretary of State's official residence and a venue for state visits and ceremonies. The house sits within formal parkland and is entered through an ornate wrought‑iron gateway.
First raised
1799
Its prime
1799
Today
Still standing
As it stood in 1799
What Hillsborough Castle looked like in its prime.
A symmetrical late‑18th‑century Georgian country house of three storeys in pale stone or rendered brick with regular tall sash windows, a central entrance with a columned portico or pediment, a hipped slate roof and several chimneys. The principal approach is through a low stone boundary wall topped by a broad, elaborate wrought‑iron gate with scrolling crestwork and gold finials. The house stands behind a gravel forecourt leading onto clipped lawns and mature specimen trees within a parkland setting; the building is complete and in active use.
Its story
The story of Hillsborough Castle.
A Georgian House for the Marquesses of Downshire
Hillsborough is not a true castle. It is a Georgian country house in the village of Royal Hillsborough, in the north-west of County Down, built in the eighteenth century for the Hill family, Marquesses of Downshire, and dated to 1799. The Hills owned it until 1922, when the 7th Marquess of Downshire sold the mansion and its grounds to the British government.
Government House and the First Governor, 1925
In buying it the government solved a practical problem. Under the Government of Ireland Act 1920 a new and distinct region of the United Kingdom called Northern Ireland had been created within the traditional province of Ulster, but without Cavan, Donegal and Monaghan, which became part of the Irish Free State. Executive authority over Northern Ireland and its sister region of Southern Ireland had been vested in the Lord Lieutenant of Ireland, intended as one of two all-Ireland features of the new home rule structure alongside the Council of Ireland. That office was abolished in a law change following the Anglo-Irish Treaty of 1921, which in effect aborted Southern Ireland — a region that had in reality only existed on paper — and established the Irish Free State.
A new office for Northern Ireland alone was created, that of Governor. The Viceregal Lodge in Dublin had become unavailable, physically and politically, so a new residence was needed, and Hillsborough, though it lay outside Belfast, was deemed suitable. After some renovations the first governor, the 3rd Duke of Abercorn, moved in during 1925, and on becoming the governor's official residence the building was renamed Government House. It served in that role from 1924 until the post was abolished in 1973.
Direct Rule and the Anglo-Irish Agreement, 1972–1985
The decision in March 1972 to abolish Northern Ireland's devolved system of government and institute direct rule from London abolished every Northern Irish governmental post, Governor and Prime Minister of Northern Ireland among them. The two were in effect combined to create the office of Secretary of State for Northern Ireland, who, as the then Queen's representative, moved into Hillsborough at that time. The house went on being used for important meetings and conferences: the Anglo-Irish Agreement was signed here on 15 November 1985, and in April 1999 Mo Mowlam opened the castle's extensive grounds to the public.
From the Golden Jubilee to the King's Visit, 2002–2022
Queen Elizabeth II and Prince Philip stayed at Hillsborough on the Golden Jubilee tour of Northern Ireland in 2002, and President George W. Bush visited in 2003. In January 2010 the house was used for talks between the British Prime Minister Gordon Brown, the Taoiseach Brian Cowen and representatives of the Democratic Unionist Party and Sinn Féin on the crisis over Northern Irish policing, which threatened to derail power-sharing and to collapse the Northern Ireland Executive.
In April 2014 the then Prince of Wales held an investiture there, the first to be held in Northern Ireland since the venue became a royal residence, and in the same month Historic Royal Palaces took over its management and opened it to paying members of the public. On 13 September 2022 King Charles III visited with Queen Camilla and responded to an official message of condolence from the Northern Ireland Executive. It remains the official residence of the Secretary of State for Northern Ireland and the official residence in Northern Ireland of the British monarch.
Step inside
5 places to explore in 1799.
The record describes 5 distinct spots at Hillsborough Castle, including 1 interior: ground-floor state reception room. Create your own photoreal reconstruction and explore every one, more scenes means more rooms, more angles, and more of the place to stand in.
Build Your Own Castle
Recreate Hillsborough Castle with AI to explore it.
The artist rebuilds it as it stood in 1799, a photoreal reconstruction that belongs to you alone. Pay with coins, no subscription needed.
Recreate this castle →Castle Siege
Play Castle Siege at Hillsborough Castle.
A strategy game played on Hillsborough Castle’s real ground plan: the same surveyed walls shown in the archive below. Post your finite garrison on the battlements between assaults, then hold out as rams, siege towers, trebuchets and sappers arrive in ever-worse waves.
Sign in free to see the garrison muster. One castle costs 150 Clan Coins and is yours forever.
Sign in to take command →Whose castle
Clans who held Hillsborough Castle.
The families that held Hillsborough Castle for a decade or more across its history, follow a name to its clan.
Built in the 18th century for the Hill family, Marquesses of Downshire, who held it until 1922.
Nearby
