Roman Catholic Church of Our Lady of Lourdes, and associated gate piers and railings

The Roman Catholic Church of Our Lady of Lourdes was built in 1928 to designs by F A Walters and includes associated gate piers and railings.

The church is externally faced in Bath stone laid in random courses, with slate roofs described in the parish history of 1936 as Cornish green and brown slates.

The church is orientated north-south, but this description follows conventional liturgical orientation. The plan consists of a western tower flanked by a baptistery to the north and flush porch to the south, an aisled nave with flush transepts, and a sanctuary flanked by a Lady Chapel to the south and sacristies to the east.

The exterior is dominated by a centrally placed tower in the Hertfordshire style, square and short with a needle spire. It is of three stages and rises to approximately 15 metres, with offset corner buttresses. The right (south) buttress incorporates the foundation stone. The entrance doors are flanked by carved figures of St Thomas More and St Nicholas in canopied niches. The second stage of the tower has two two-light windows with Perpendicular tracery flanking a central figure of Our Lady in a canopied niche. The third (belfry) stage has two two-light cusped openings with louvres. Above the embattled parapet is a copper-covered spire topped by a weathercock with cross keys, the symbols of St Peter. A porch with side door projects from the south side of the tower. Protruding in front of the tower are new glass panels marking the sides of the stone stairs down to facilities in the undercroft. At the sides of the church, the aisle windows are each of two lights with Perpendicular tracery, while the taller gabled bays (transept and former organ loft on the north side, transept on the south side) have three-light windows. At the east end there is a high five-light window, with the sacristies below.

The total internal length is 30 metres and the width 13 metres, while the height of the nave is 9 metres. Inside, the tower area is as recently remodelled, with a lift down to the undercroft and new screen doors to the tower which incorporate an etched glass design. The main space of the nave consists of a three-bay arcade with octagonal Bath stone piers and arcade, and a coved and panelled ceiling with moulded ribs and cornices, all in unvarnished pine. The wall surfaces are plastered and painted. At the transepts the arcades are taller and the timber ceiling over the crossing is rib vaulted. The chancel is higher than the nave and has two two-light clerestory windows on the south side and one on the north, as well as the high five-light east window. The timber ceiling is similar to that in the nave but shallower in profile.

The church is relatively unaltered and retains its chief liturgical furnishings, designed by the architect but in some cases adapted, with stone carving by Earp and Hobbs and stained glass by Burlison and Grylls, A A Orr and others. The main features are the high altar and reredos, now separated, made by Earp and Hobbs. They are of Seaton stone, with the mensa and some other trim of black marble. The altar frontal has a richly carved central panel of the Agnus Dei and blind traceried panels at the corners. In the reredos, the original super-altar has traceried panels with emblems of the Passion. Placed upon this at the centre, the tabernacle has a metal repousse door, gilded with enamels. Above this, the reredos covers the entire east wall up to the window. A central monstrance throne with a tall canopy is flanked on either side by saints under canopies: from left to right, Saints Lucy, Owen, Leonard, Helena, Bernard and Agnes. Above them is an embattled cornice.

The communion rails survive only in part. They are also in Heaton stone, with Hoptonwood marble top and are ornamented with a panel depicting the emblems of the Blessed Sacrament. On the south side is an inscription requesting prayers for the donors, E St G Mivart and M Mivart. On the north side is the relocated pulpit, of Seaton stone, with four traceried panels and high-relief carvings of the emblems of the Evangelists.

An oak Gothic screen divides the Lady Chapel from the south aisle. The Lady Chapel was erected by Mrs Stowell in memory of her husband, Lieutenant Wilfrid Stowell, killed in action in 1918. Like the high altar, the Lady Chapel altar is of Seaton stone, with a black marble mensa and trim. At its centre is a statue of Our Lady of Lourdes, flanked by St Anne and St Joachim, all under rich canopies and crowned by a cornice.

The baptistery, at the west end of the north aisle, was fitted out from a legacy of over £2000 from Mrs Emily Upperton, who died in 1928. It retains its wrought iron, painted and gilded gates and marble floor. However the font is now at the west end of the nave, where it also serves as a holy water stoup, and an enclosed stair to the organ loft, accessed from the tower area, has been formed within the former baptistery area. The relocated font is also of Seaton stone, octagonal in form, on a marble step. The bowl is supported by angels with traceried panels, the centre one depicting the Baptism of Christ.

The subjects for the stained glass windows were chosen by F A Walters, and several were installed before his death in 1931. The five-light window over the high altar was given in memory of James Robarts Briggs, his parents and his wife's parents. It depicts Christ enthroned, flanked by Our Lady and St James on the left and St Joseph and St Catherine on the right, by Burlison and Grylls, 1928. In the north chapel (more a passage to the sacristies), two single-light windows depicting St Peter and St Aloysius Gonzaga, dedicated to Father Peter Louis Martin, who died in 1916, the first priest to say Mass in Harpenden since the Reformation (in 1905), by A A Orr, 1936. In the south (Lady) chapel, a two-light window depicts Our Lady of Sorrows and St Wilfrid, in memory of Wilfrid Stowell, who died in 1918, and erected by his widow, by Burlison and Grylls, 1928. In the transepts, three-light windows depicting on the north side the Crucifixion and scenes from the Passion, given by James Robarts Briggs in gratitude to God for a good wife, and on the south side scenes of Our Lady of Lourdes. The date and designer of these windows is not known; the parish history of 1936 suggests that the installation of these windows was imminent, and stylistically they look to be by Burlison and Grylls.

In the aisles, a series of two-light windows depict the English Martyrs. Starting on the north side, working from east to west: Cuthbert Mayne and John Southworth, given anonymously in 1934, signed A A Orr and F D Humphreys; William Howard and John Fisher, erected by public subscription in 1935 in memory of Cardinal Bourne, signed A A Orr and F D Humphreys; Richard Langhorne and Margaret Clitherow, 1946, given by Arthur H J Miller, artist not known.

In the south aisle, from east to west: Edmund Campion and Alban Roe, to Eric Yeo, who died in 1929, the first of the martyrs' windows to be installed, from designs by Burlison and Grylls; Margaret Pole and Thomas More, given in memory of Father Longstaff's silver jubilee in the priesthood (1931), by Burlison and Grylls; Henry Heath and John Houghton, installed in 1945 in thanks for protection of the church and parish in the Second World War.

At the west end, the west window is of four lights and depicts the Annunciation and the Ascension, by the Harpenden firm of Hendra and Harper, 1945. In the baptistery, a two-light window depicting the Baptism of Our Lord and an angel holding Christ's robe, to the donor Mrs Emily Upperton, who died in 1928, by Burlison and Grylls.

The other furnishings most worthy of note are the Stations of the Cross, high relief polychrome panels executed in composition by the Belgian sculptor Aloys de Buele (1861 to 1935) and original to the church.

Seven ashlar stone square-plan piers mark the south boundary to Rothamsted Avenue, linked by wrought-iron railings on an ashlar stone plinth wall. Double-leaf wrought iron gates stand at the centre. Wrought-iron railings on a kerb wall run along the west boundary of the site.