Castletown House

Teach Bhaile an Chaisleáin

Castletown House

Teach Bhaile an Chaisleáin

Ireland's Ancient East graphic motif based on stone carvings at New Grange

The beautiful Castletown House is one of Ireland’s grandest 18th century estates.

The History of Castletown House and William Conolly

One of Ireland’s most spectacular landed estates, the elegant Castletown House is situated in Celbridge, Kildare, alongside the River Liffey and within easy reach of Dublin. It was the palatial residence of William Conolly. Originally from Ballyshannon in County Donegal, Conolly was the son of a publican, but he had a stratospheric rise through the ranks of Irish society to become one of the wealthiest and most powerful men in Ireland and Britain. He achieved this in the aftermath of the Williamite Wars that had ravaged Ireland in the late-17th century. In the wake of King William’s victory, many Irish Catholic landowners were dispossessed of their lands and estates, which were then granted to King William’s Protestant supporters. This period became known as the Protestant Ascendancy. William Conolly had trained as a lawyer, and specialised in land transfers. Many who had been granted land immediately sought to sell it in order to make a fast profit. Conolly’s shrewdness and legal expertise helped him acquire large tracts of land across Ireland, often at knock-down prices. This later included the Duke of Wharton’s estate at Rathfarnham, where he built his hunting lodge that later became known as the Hellfire Club, (where we carried out our archaeological project in 2016).

Conolly also improved his fortunes with his marriage in 1694 to Katherine Conyngham, the daughter of a prominent Williamite general, which brought with it a substantial dowry of £2,300. Conolly soon owned land in eight Irish counties along with estates in Wales. His properties brought him an annual rental income of £25,000, a massive sum at the time, equivalent to many millions in today’s terms.

Supported by his new wealth and his wife Katherine, William Conolly embarked on a political career, and was duly elected to the Irish Parliament for Donegal in 1692. He became a famous parliamentarian, and achieved the rank of Speaker in the Irish Parliament from 1715–29, a role that became so synonymous with him that he was known as William ‘Speaker’ Conolly.

In 1707 William Conolly purchased his lands at Castletown. Construction of the mansion began in 1722 and the main part of the construction was completed by 1729, although the grand staircase was not installed unit 1759–60. Its design was influenced by the renowned Italian architect Alessandro Galilei, who met Conolly while visiting Ireland. The work was directed by the noted Irish architect Edward Lovett Pearce.

Unfortunately William Conolly did not have time to enjoy his beautiful house as he died in 1729. His widow Katherine continued to live in the house and commissioned a number of spectacular follies (like the nearby Wonderful Barn and Conolly Folly) to keep local people employed during periods of hardship. Following Katherine’s death in 1752, Conolly’s nephew (also called William) inherited the estate. He died two years later and his son Thomas and his wife Lady Louisa came to inherit Castletown. Lady Louisa in particular left her mark and was constantly making improvements to the house and gardens. Thomas Conolly was a member of Parliament and became an important figure in late 18th-century Irish politics.

A guided tour of the house is the best way to get a full appreciation of the architectural marvel that is Castletown. Notable features include the Long Gallery, a 24-metre (80-ft) room on the first floor that was used to entertain guests. Intricate decorative stucco plasterwork by the Lafranchini brothers adorns the house, while the staircase with its brass balustrades is another eye-catching feature. Castletown contains 100 rooms and 229 windows and is set in 120 acres of beautiful landscaped grounds stretching down to the River Liffey. Its scale alone, quite apart from its design, make it hugely impressive. As one 18th-century commentator remarked:

‘This I believe to be the only house in Ireland to which the term “palace” can be applied.’

The story of Castletown House continues below the gallery.

Visiting Castletown House – Information

Partial Wheelchair Access
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