Cardiff Metropolitan Cathedral of Saint David

The Metropolitan Cathedral Church of St David, also known as St David's Cathedral, Cardiff, is a Catholic cathedral in the city centre of Cardiff, Wales, and is the centre of the Archdiocese of Cardiff.

Located in Charles Street, the cathedral remains the focal point for Catholic life in Cardiff, and the country as a whole. It is one of only three Catholic cathedrals in the United Kingdom that is associated with a choir school.

Source: Wikipedia