St Mirin's R.C. Cathedral, Incle Street, Paisley

St Mirin's Roman Catholic Cathedral, located on Incle Street in Paisley, was designed by Thomas Baird and constructed between 1930 and 1932. This Romanesque-style cathedral features a canted apse and a narthex flanked by towers. The exterior is made of cream sandstone, squared and snecked, with ashlar dressings and stone mullions. Notable architectural details include sawtooth coped buttresses, nookshafts, and scalloped corbel tables, along with round-arched openings and an eaves course.

On the south elevation facing Incle Street, the gabled end of the nave is highlighted by a stepped three-light window, cushioned-capitalled nookshafts, and a corbel table at the gablehead topped with a cross finial. This is flanked by advanced, panelled corner shafts. The nave is supported at ground level by a seven-bay narthex, which has a single-storey five-bay centre and two-stage square section corner towers. The three central bays each contain a door with nookshafts on the jambs, while the penultimate bays feature small windows. The squat towers have buttressed angles, square-headed bipartite windows on the outer faces at ground level, and round-arched bipartites in the upper stage, all beneath a scalloped corbel table, crenellated parapet, and pyramidal slate roof.

The east and west elevations are nearly identical, each consisting of seven bays with corner towers serving as the outer eighth bay to the south and an apse/sacristy corridor extending to the north. Each elevation includes five-bay lean-to aisles at ground level with paired round-arched windows, interrupted by projecting lean-to confessionals in the penultimate bays to the south and north, and paired windows in the clerestorey above. The outer bays are gabled and feature tall paired windows in round-arched panels, with additional lean-to projections at ground level to the south and gabled porches to the north.

The north elevation showcases a canted two-stage apse, surrounded at ground level by a piended sacristy/offices/corridor, and three-light round-arched windows in the upper stage at the clerestorey. A cross finial sits atop the nave gable behind.

The cathedral features square-pane leaded glazing, with stained glass in the apse. The roof is covered with grey slate and includes stone finials and ashlar coped skews.

The boundary walls consist of coped sandstone dwarf walls with intermittent stone piers that have battered coping, along with later railings.