St Ignatius Parish Church, Carryduff

St Peter's Cathedral, built in the 1860s, is Belfast's Catholic cathedral. During the 19th century, thousands of Catholic workers came to Belfast in search of employment in the growing industries, particularly in the flax industry. The centre of Catholic life in Belfast at that time was St Mary's Church in Chapel Lane, near the old city centre. In 1858, in order to enable the growing number of worshippers to attend services, Barney Hughes, a leading Catholic lay preacher and wealthy bakery chain operator, bought land between Dystart Street, Derby Street and Alexander Street and gave it to Bishop Denvier. Construction of the cathedral began in 1861.

St Anne's Cathedral, built between 1899 and 1904, is the Anglican cathedral (Church of Ireland) in Belfast. The church was built in a Romanesque Revival style by the architect Sir Thomas Drew. The nave was originally built on the site of the former parish church of St Anne.

Christ Church Cathedral is the Anglican cathedral of Lisburn. Construction of the present building began in 1708. A church was built on the site of the cathedral in the early 1600s by Sir Fulke Conway as a chapel of ease for his new castle. It was consecrated in 1623 and dedicated to St Thomas, but was destroyed with much of the town during the rebellion of 1641. The church was soon rebuilt and in 1662 St Thomas's was designated by Charles II as the cathedral church of the diocese of Down and Connor and renamed Christ Church Cathedral. However, the cathedral burned down in 1707.