The cathedral is built next door to
St. Patrick's, Carlow College, the former seminary of the diocese. Architect
Thomas Cobden, designer of much of the adjacent college, designed the cathedral, in the
Gothic Revival style. The tower and lantern was inspired by the
Belfry of Bruges,
Belgium. The grey-blue stone was from the quarry on the Tullow Road. Extensive refurbishment was carried out in 1899 under Bishop Michael Comerford. A carved oak pulpit was designed by C.J. Buckley of
Youghal and made in Bruges in 1898. The ornately carved pulpit is now in the
Carlow County Museum. The main altar of Sicilian marble replaced the original wooden one. The new altar was consecrated by Bishop Comerford on 25 May 1890. It was made by Samuel Daly and Sons of Cork, and donated by the clergy and religious of the diocese in memory of the Very Rev. James Walsh, Bishop from 1856 to 1888. Bishop Walsh is buried in the cathedral in the same grave as his kinsman, Bishop Delany. Comerford also gave and consecrated the great bell, cast by John Warren and Sons of London. The oak-framed Stations of the Cross, donated by various Carlow families, were erected in 1896. In 1902 the stone baptismal font was replaced by a marble one as a memorial from the people of Carlow of Rev. John Corbett C.C., who died in accident while out shooting. The marble communion rails were installed in 1903. The Episcopal chair, fashioned in Bruges, is of panelled oak from the nearby estate of Oak Park. The marble statue of St. Patrick next to the Sacred Heart altar was a gift from the priests of the diocese in memory of Bishop Patrick Foley. During the refurbishment in the 1990s, new works were installed including a new altar and baptismal font by Michael Hoy. The organ was cleaned and tuned by the Irish Organ Company. ==Burials==