Cahir Castle is situated on Castle Street overlooking the River Suir in town center. The castle is of 13th century construction and was quite formidable in its day. The original owners, the Butlers (the same family who owned Kilkenny Castle in Kilkenny City), were staunch supporters of the English crown from the time of the Anglo-Norman invasion (1171AD) and were granted a Barony in Cahir in 1375AD for their loyalty.

The castle was renovated and extended in the 15th century and again in the 16th century but continued to remain in the Butler family until 1964.

There are four major areas of this site, the Outer, Middle and Inner Wards and the Barbican at the outer entrance.

The Inner Ward is on the site of the original Norman castle; the foundation, Keep and curtain walls are 13th century. The Keep was restored in recent years and includes a great hall, which is mostly 18th century construction, though it comprises a wall and window of 15th century construction.

From the ramparts, as well as the upper floors of the Keep, you can see the River Suir rush past. From the Keep windows in front you can see the weir on the other side of the bridge.

The Barbican was a main gatehouse into the Inner Ward and remains quite detailed today. You can see the workings of the gate inside the castle. It should be noted that this gatehouse was used in part of the filming of the movie "Excalibur".

On each of the towers you will notice finely made weather veins. No two are alike.

Along the side of the castle, running parallel is a walking path that will take you up to the Swiss Cottage. It's about a mile long walk. If you prefer to drive, from the car park go right to Ardfinnan Road. Follow the signs out to the Cottage car park and walk across the bridge to the Cottage entrance.