St Andrew's R. C. Cathedral, 150 Nethergate, Dundee

St Andrew’s Roman Catholic Cathedral, located at 150 Nethergate, Dundee, was designed by George Mathewson and built in 1835. The apse was added later by C J Menart in 1921. It is a rectangular-plan, aisleless cathedral with a Gothic facade, incorporating basement halls and a four-storey, five-bay presbytery adjoined to the south gable. The exterior is constructed primarily of pale sandstone ashlar for the facade, with rubble walls and ashlar dressings elsewhere. The roof is covered in grey slate. The front elevation features tall, Tudor-arched windows with intricate tracery, hoodmoulds, and mask label stops. Buttresses are present with crocketted finials, and the central gable is topped by a coped parapet with a cross finial, crenellated and sloping to the sides. An ashlar-coped skew is visible at the rear.

The front elevation is arranged in three bays. The central bay, slightly projecting, contains a pair of doors with a vertically-astragalled fanlight. A multi-moulded pointed-arch doorpiece is present, featuring nook shafts and a crocketted ogival hoodmould rising through the crenellated parapet. A three-light window is situated above the doorpiece. Single windows are positioned above paired canopied niches in the flanking bays. Tudor-arched doors are found in the left and right return bays. The side elevations have five margined nave windows above bipartites to the basement level.

Inside, the cathedral has a wide, aisleless nave with a plastered timber roof supported by corbelled bosses. A rear gallery is accessed via a four-centred arch arcade of clustered columns. Nook-shafted windows contain stained glass created by William Wilson between 1957 and 1971. The interior also features painted panels depicting Saint Margaret, Saint Catherine, and Saint George, along with Stations of the Cross. Gothic altars dedicated to the Sacred Heart and Our Lady of Perpetual Succour are present, alongside a timber traceried altar rail and marble pulpits. The sanctuary is defined by a four-pointed arch with nook shafts resting on angel corbels. The apse, remodelled in 1921, is panelled in coloured marble and timber and includes a traceried High Altar with an elaborate painted reredos.

The adjoining presbytery, located on the south gable of the cathedral, is pierced at the fourth floor and roof level by the apse. It rises from three to four storeys, with the centre bay recessed, featuring a fanlight over a later projecting, pedimented porch. A tripartite leaded-glass window sits above the porch. A harled stair drum, added in 1921, rises through the first and second floors. The roof is flat with a railed parapet. A canted, harled apse extends to the roof, featuring pointed arch windows and an incised cross. Rubble-built gables have a circa 1870 channelled ashlar porch added to the east. Timber sash and case windows with 12 panes are present throughout.

A former sea wall, originally the boundary wall of the Town Hospital, forms the boundary wall to the south. Dating from the 18th century, it comprised random rubble with an ashlar entrance, later modified with a garage door to the east.