Almost everything worth seeing in Cahir was built by one family. The castle, the house on the Square that is now the hotel, the Swiss Cottage by the river, the layout of the town itself: all Butler. Understanding the family is the shortest route to understanding the place.
Where they came from
The Butlers were one of the great Anglo-Norman families of Ireland, and the Earls of Ormond were the senior line, seated eventually at Carrick-on-Suir. The Cahir Butlers were a branch of that family, and their rise here has a precise date.
In 1375 James Butler, third Earl of Ormond, was granted the castle at Cahir for his loyalty to Edward III. From that grant the family held the place for close to six hundred years.
Titles
The Cahir line accumulated the titles you will see on plaques and monuments around the town: Baron Cahir, and later Earl of Glengall. Both appear in the local record, sometimes for the same man, which is why the names in a Cahir churchyard can be confusing.
The castle years
Cahir Castle was the family seat for the first four hundred years. The Earl of Essex besieged and took it in 1599 after three days, killing around eighty defenders. In 1650 it was surrendered to Cromwell without a shot. Castles that resisted Cromwell were slighted. Cahir is intact because the family knew which fights not to have.
Moving out
In the 1770s the family moved out of the castle and into a new Georgian house on the Square. A castle is impressive and cold; a Georgian townhouse is neither. That house is now Cahir House Hotel, and you can stay in it.
Pierce, Lord Cahir died in 1788 without an heir, and the estates passed to Richard Butler of Glengall, who married Emily Jeffereys of Blarney in 1793. They were young, they had money, and they entertained. Under them the town was substantially rebuilt, and around 1810 they commissioned the Swiss Cottage downriver, its design attributed to John Nash. St Paul's Church in the town is also attributed to Nash, which gives a small Irish town two buildings by one of the leading architects of Regency Britain.
The work continued under the next Earl. A topographical account of 1837 recorded that Cahir owed its rise to the late Earl and had been enlarged and greatly improved by the present one, which is a fair summary of how the town got its shape.
The bankruptcy
In 1853 Richard, Earl of Glengall was declared bankrupt and the Cahir estates were sold. This was not unusual: the Famine and its aftermath destroyed a great many Irish landed estates, and the Encumbered Estates courts disposed of them at speed.
What is unusual is what happened next. Some twenty years later his daughter, Lady Margaret, bought Cahir House and the entire Cahir estate back. It is a rare thing in nineteenth century Ireland for a family to recover an estate once it had gone.
The end
The family held on until 1961, when Lady Margaret's son Richard Butler Charteris died. The castle passed to the Irish state, and a six hundred year association ended.
What they left
Three buildings, all of them open to the public in one form or another: the castle as a national monument, the house on the Square as a hotel, and the Swiss Cottage as a museum. The Butler Trail links Cahir with Clonmel, Carrick-on-Suir, Fethard and Roscrea and follows the family across Tipperary, with a free audio guide.
For the town's wider story, the history of Cahir covers the abbey, the mills and the garrison. A guided walking tour takes in the Butler buildings with the stories attached.