[9][10] The Celbridge Interchange (Junction 6 of the M4) which connects the town to the motorway as well as the Intel and Hewlett-Packard plants in Leixlip, was opened in 2003 to help address related traffic issues, with some success.

Celbridge GAA park and centre on the Hazelhatch Road was opened in 1996, ending 52 years without a home, the club having lost its field in Ballymakeally after a court case in 1944.

Success in the top hurling competition in Kildare would not arrive until 2005 when Celbridge, managed by Jimmy Doyle, beat Coill Dubh in the final.

There is evidence of 5,000 years of habitation, as evidenced by beads and quern stones in the National Museum from Griffinrath (53°20′56″N 6°34′26″W / 53.34891°N 6.57386°W / 53.34891; -6.57386), and the nearby high ground sloping down to the Liffey.

Research has linked Celbridge with the Slí Mór possibly crossing the Liffey at a ford located below the site of the mill directly east of the bridge rather than at Castletown House, as previously thought.

The original Kildrought parish church (built 14th century, burned 1798) stood in the present graveyard at Tea Lane and houses the mausoleums of the Dongan and Conolly families.

His widow remained in Killadoon, outliving the two men who took over the town from her husband and John Dongan, Bartholmew Van Homrigh and William Conolly.

He was appointed Chief Commissioner for Stores in Ireland for the victorious allied forces of William III and Mary II who defeated the Jacobite alliance, and enforced the Treaty of Limerick in 1691.

The new leases were granted on condition that the builders erect substantial stone houses with gable ends and two chimneys, replacing mud cabins and waste ground.

The result was to move the axis of Celbridge away from the bridge, corn and tuck mill and road to St Mochua's church to a new Main Street.

[14] The development of the Main Street commenced with the building of Kildrought House by Joseph Rotheny in 1720 for Robert Baillie, a Dublin upholsterer who was William Conolly's greatest prospect as an improving tenant.

Richard married Elizabeth Clare,[16] proprietor of the White Hart Inn, a public house at the site of the current Londis supermarket.

Finey's successor as Conolly's agent, Dublin cabinetmaker Charles Davis, built Jessamine Lodge, an impressive fivebay house with a weather vane on the junction of Main Street and the Maynooth Road (1750).

Christopher Barry's Auctioneers was built in 1840 by Richard Nelson and let to Chief Constable Marley, it replaced an old dwellinghouse with stables and offices where William Wadsworth, the original Irish Straw Manufacturer and exporter lived and operated at the end of the 19th century.

[21] The Manor Mills (built by Louisa Conolly in 1785–1788, extended by Laurence Atkinson 1805, restored 1985) incorporate parts of the old Celbridge Market House.

[24] the mill was described as employing several hundred people when King George IV visited Celbridge in August 1821[25] and the description "biggest wool manufactory in Ireland" was repeated in the 1845 Parliamentary Gazeteer.

In 1752, Dr Price's estate bequeathed £100 to Richard's son, the 27-year-old Arthur Guinness to help him expand the brewery, first in 1755 on a new site in Leixlip and from 1759 in St James's Gate in Dublin.

Despite the report in the Irish Times of 25 June 1904 that facilities of the company were "totally inadequate to cope with demand" and that "Celbridge peat paper is finding its way into almost every village and hamlet in Ireland" the enterprise had already run into financial trouble by November 1904.

That year a consortium of Brian and Tony Rhattigan and the McMullan brothers, who owned the Maxol petroleum group, purchased most of the former Castletown Estate for development purposes.

In response Desmond Guinness personally bought the house in 1967 to save the immediate hinterland from development and established the Irish Georgian Society in the building.

The house was inherited by Tom Conolly (1738–1803) in 1758 and the interior decoration was finished by his wife Louisa Lennox (greatgranddaughter of Charles II of England and Louise de Keroualle) during the 1760s and 1770s.

It is built to the rear of Castletown House which contains two follies, both commissioned by the widow of Speaker William Conolly to provide employment for the poor of Celbridge at a time when famine was rife.

Celbridge Abbey was the childhood (1688–1707) and later adult (1714–1723) home of Bartholomew Van Homrigh's daughter Esther (1688–1723), the ill-starred lover of Dean Swift.

The current Celbridge Abbey was constructed by Thomas Marlay, Lord Chief Justice of Ireland, grandfather of the Irish parliamentarian Henry Grattan.

Oakley Park, the current St. Raphael's hospital was built in 1724 to a design by Thomas Burgh for Arthur Price, when he was created Church of Ireland Bishop of Meath.

After his departure for Cashel, Oakley Park became home to Col George Napier, Richard Maunsell, High Sheriff of Kildare and his descendants, and, in 1926 Justin McCarthy.

St Wolstan's after the Archbishop's cousin, also John Alen, who was master of the rolls, travelled with Aylmer to England in 1536 to receive the bill for suppression of the Irish monasteries.

The act of St Wolstan's, introduced in September 1536 as a special commission of dissolution, assured Aylmer and his fellow chief justice and brother-in-law Thomas Luttrell an annual rent of £4 during the life of Sir Richard Weston, the last prior, while Alen was granted the monastery estates.

Other large houses outside the town[45] include Killadoon a three-storey block with a single storey wing built c. 1770 (redecorated 1820) for Nathaniel Clements MP, banker and amateur architect.

[citation needed] Clements is also reputed to have designed Colganstown house, built by the Yeats family c 1760 was the property of Dublin Corporation through the first half of the 19th century.