St Comgall's Roman Catholic Church, Brunswick Road, Bangor, Co Down, BT20 3DS

St Comgall's is a double-height Roman Catholic church built between 1886 and 1888 to designs by architect Mortimer Thompson. It replaced an earlier chapel on a different site and was constructed as Bangor developed from a small settlement with limited Catholic population into a successful seaside resort and commuter town. The building is listed at Grade B2.

The church is built in squared rubble masonry coursed in greywacke with secondary Scrabo sandstone and Portland limestone, with a sandstone plinth and corbel course. It features long-and-short quoins and is roofed in natural pitched slate with clay ridge tiles. The architectural style is Gothic Revival.

The principal north-facing elevation is gabled with a distinctive three-stage square bell tower positioned to the left. The tower is segmented by drip courses, with a single lancet window at the first stage, three clustered arrowloop openings at the second stage, and paired louvered gothic openings at the third stage. It rises to a gabled roof topped with a trefoil and is surmounted by crested ridge tiles and an apex stone with gablets and gable cross. The principal entrance is centrally located on this elevation, marked by diagonally timber-sheeted double doors set within gothic ashlar sandstone surrounds with chamfer-stops and hood-moulding, ornamental head-stops, and a cross engraved into the tympanum. Above the entrance is a large traceried gothic window. A single-storey porch matching the church's detailing, dating from around 1980, abuts the east face of the tower.

Stained glass windows are embedded throughout the church in lancet openings with sandstone surrounds. The gabled south elevation features three centrally located lancet windows with a relieving arch over, flanked by modern single-storey service and secondary accommodation. The west elevation contains six lancet windows with a modern single-storey extension on the right side.

The church occupies an irregular plan form resulting from multiple alterations and additions to the original barn-type structure. A major enlargement was carried out around 1983, adding a further aisle and porch to the east together with two rear extensions providing secondary accommodation. These extensions are cement rendered with plain detailing. A vestry formerly located to the south-east was removed during these works. Replacement square-section extruded metal rainwater goods are fitted throughout.

The church suffered severe fire damage in January 1985, which almost completely destroyed the building. Following restoration, it was re-dedicated in December 1985. The interior has been modified since the original construction. In 1917, the original Caen stone altar erected in 1888 was replaced with a new Gothic-style high altar designed by J J McDonnell of Belfast and sculpted by Edmund Sharpe of Dublin. That same period also saw the insertion of stained glass windows, mosaic pavement in the sanctuary, the Stations of the Cross, and the Little Flower Hall, all overseen by Rev Scally, who became parish priest in 1916.

The building faces directly onto Brunswick Road in Bangor West and is surrounded predominantly by detached single and two-storey residences, with a modern primary school located immediately to the east and south, and the presbytery immediately to the west. The property is defined by walling with gated piers at the front entrance, constructed in matching masonry type and detailing to the main body of the church.

The listing extends to the church, gates, piers, and walling. St Comgall's is of architectural interest for its style, proportion, ornamentation, and plan form, and is considered a good example of a minor work by a notable architect. It is also of historical interest for its authorship, local significance, and social and cultural importance to the Catholic community.