The remains of Tullaherin church and round tower, County Kilkenny. It is believed that a monastery was founded here by Saint Ciarán of Saigir. He died c.530 so presumably established a presence here at some date previous. Nothing survives of the original foundation, the present church being of two periods, the nave perhaps 10th century while the chancel is likely from the 15th century. In the aftermath of the Reformation, it continued to be used by members of the Established Church and was renovated in the early 17th century. However, by the 19th it had already fallen into ruin.

Like so many others around the country, the round tower at Tullaherin is missing its upper portion and capped roof: what remains rises almost 74 feet. Originally there were eight windows around the tower, the only other tower having so many being that at Clonmacnoise, County Offaly. The door is just over 12 feet above ground.