St Canice’s Cathedral, also known as Kilkenny Cathedral, is a cathedral of the Church of Ireland in Kilkenny city, Ireland. It is in the ecclesiastical province of Dublin. Previously the cathedral of the Diocese of Ossory, it is now one of six cathedrals in the United Dioceses of Cashel and Ossory.
The present building dates from the 13th century and is the second longest cathedral in Ireland. Beside the cathedral stands a 100 ft 9th-century round tower. St Canice’s tower is an example of a well-preserved 9th-century “Celtic Christian” round tower. It is dedicated to St Canice. It is one of only two such medieval round towers in Ireland that can be climbed to the top.
The cathedral stands on an ancient site which has been used for Christian worship since the 6th century. In the 1120s the see of Ossory was moved from Aghaboe to Kilkenny.