Designed by John Roberts and built between 1793 and 1796, the Cathedral of the Most Holy Trinity has remained about 220 years old and is the oldest Roman Catholic Cathedral in Ireland. Striking architectural features and stunning stain glass windows feature in this well loved Cathedral.

In 2000, the square near Barronstrand Street (formerly known as “Red Square”) was re-named as “John Roberts Square” in light of the influence he had over the architecture of the two Cathedrals in Waterford.

In more recent years, the Cathedral was refurbished in 1977 following the Second Vatican Council – A new altar was installed so that Mass could be celebrated facing the people. A gift of 10 crystal chandeliers from Waterford Crystal enhanced the decor of the Cathedral. In the early 1990’s a complete reflooring of the building and a restructuring of the sacristy took place to complete what is a truly wonderful Cathedral. Further work was completed in November 2006 with a re-fit of structure, the interior and exterior.