St Mungo's Church, 25 Mar Street, Alloa

St Mungo's Church, located at 25 Mar Street near the centre of Alloa, was built in 1959 by architects William Friskin and William Allan. It is a rectangular basilican-plan church constructed in brick with concrete dressings, representing a stripped modern design inspired by Dutch modernism of the interwar period.

The external design is characterised by geometric simplicity and asymmetry. The main entrance to the east has an asymmetrical gabled form with five slender windows and low flat-roofed sections flanking a two-bay entrance porch with decorative panelled and glazed doors. On the north side stands a square-plan squat tower with vertical strip mullions and louvered openings, with a pair of set-back entrance doors in an open porch at its base. The nave and sacristy feature tall narrow windows with shaped concrete margins. The front elevation and Lady Chapel have smaller round-arched windows. Windows throughout are metal-framed with squared leaded opaque glazing and some opening pivots. The main roof has a shallow pitch behind a brick parapet wall. The smaller pitched roofs over the sacristy and Lady Chapel are finished in slate with shallow-angle overhanging eaves, served by cast iron hoppers and downpipes. The church is set back from the street behind contemporary low coped walls with decorative wrought-iron railings and gates.

The interior is a spacious open basilican-plan space with painted render and an angled ceiling. Eight pairs of octagonal columns create side passage aisles. The stepped altar area at the west end is lit by five square-headed slit windows on each side and is dominated by a prominent tall timber baldacchino with slender supporting columns, with a bronze sculpture of the crucifixion on the end wall. A matching set of geometrically styled altar table, pulpit and font in multi-coloured marble stands in this area. To the north is a small Lady Chapel with a vaulted ceiling and triple-arched window filled with highly coloured dalle de verre stained glass by Sadie McLellan. Contemporary ceramic mosaics in timber panels depicting the Stations of the Cross line the side aisles. Fixed timber pews throughout have pivoted kneelers. The sacristy at the rear contains bespoke timber fitted furniture. The main entrance lobby has exposed brick and paired timber and glazed doors, with a narrow brick-lined stairway leading to a balcony over the east end, lit by a five-light window and furnished with pews and a bespoke timber organ with decorative bronze fretwork. Decorative wrought-iron work appears on former baptistery doors, panels and balcony railings. Other interior details include timber doors with angled architraves, inbuilt storage heaters on the side walls, travertine detailing to flooring, skirting and column bases, and quality fixtures and fittings including sculpture by Scott Sutherland.

The separate presbytery to the side (north) and the hall to the rear (east) of the church are excluded from the listing.