in style and cruciform in plan, the church was built by Raphael Brandon between 1850 and 1854 for the Victorian church movement the Catholic Apostolic Church. It is built of Bath stone, with a tiled roof. The structure is incomplete, lacking two bays on its liturgical west side and a crossing tower. Its cruciform plan is made up of a nave with full triforium and clerestory, side aisles, sanctuary and Lady Chapel. All of the church's exterior corners have octagonal corner turrets with gabled niches and terminating in spires with gablets. The façade has pinnacled buttresses and corbelled parapets. The main entrance is at the east end, from Gordon Street, through a gabled porch with angle buttresses which links onto the Lady Chapel via an octagonal turret and two-light room. The five-bay nave has a gabled east facade with three large lancets below five smaller ones – on the inside, it has a timber hammer beam roof with angels and central bosses of snowflake design, as well as a double-arcaded triforium. It also contains a cathedra for its Angel of the Catholic Apostolic Church. The crossing is made up of roll-moulded arches on clustered columns. The transepts are gabled, with two layers of three lancets below a rose window. The south transept's windows are the most notable – the lancets have Christ in Majesty with ranks of saints, apostles and angels and earth below, whilst its rose window is by Archibald Nicholson and has a dove in the centre surrounded by musician angels and cherubim and seraphim. The church's three-bay sanctuary has a roof with stone rib-vaulting and foliated bosses, along with a sanctuary lamp by Augustus Pugin. The three-bay Lady Chapel is beyond this sanctuary, separated from it by a screen behind the high altar with open traceried window to the chapel. The chapel itself has a richly painted timber roof and stone angel along with an east facade with arcaded lancet windows below a small rose window and gable, along with gabled and pinnacled buttresses. In 1853, a fine organ was erected by Gray and Davison. It was a three manuals organ with pedals, containing 13 stops on the Great-organ, 12 stops on the Swell-organ, 10 stops on the Choir-organ and 8 on the pedal. In total there were 6 couplers. A specification of the organ as it now is can be found on the National Pipe Organ Register. One of the first organists was Edmund Hart Turpin. In 1903 a subb bass 16 ft was added to the choir-organ. Annette Peach, in her entry for Brandon in the Dictionary of National Biography, writes: "The Catholic Apostolic Church in Gordon Square, London, was built between 1850 and 1854 and, though reproducing features recorded by the Brandon brothers in their scholarly works, this extremely large church was criticized by a contemporary for its lack of originality of design. Recent scholars, however, have drawn attention to the combination of 13th- and 15th-century Gothic precedents in its design, which offer a tangible record of the Brandon brothers' study of ecclesiastical architecture." The church was designated a Grade I listed building on 10 June 1954.
University Church
From 1963 to 1994, it was known as the University Church of Christ the King and served the Anglican Chaplaincy to the Universities and Colleges of the Diocese of London. In practice it was a worship centre for students living in the university halls nearby, but was also used occasionally for London-wide events, with a very strong emphasis on music in worship. This new role was begun with a morning Eucharist at which the Bishop of London, the Right ReverendRobert Stopford, celebrated and an Evensong with the former Bishop of London, J. W. C. Wand, preaching), both on 6 October 1963. During this period, a Thanksgiving Eucharist was celebrated on 27 November 1988 for the 25th anniversary of this role, with the Right Reverend Michael Marshall preaching and, on 6 December 1983, the memorial service for Nikolaus Pevsner was held here. The last Sunday service was held on 28 June 1992, but a weekday Eucharist continued to be celebrated in the English Chapel. The last chaplaincy service was conducted on Ash Wednesday 1994 by the ReverendAlan Walker of the University of Westminster; The Diocese surrendered its lease on the church to the Trustees on 30 June. A popular student venue, the Crypt Café, ran in the basement for several years until that date.
Euston Church
Euston Church, a Church of England Bishop's Mission Order plant, started meeting in the church from September 2015, with services at 10.30am and 5pm.
Forward in Faith
The Lady Chapel / English Chapel at the east end of the Church is used by the Anglican Forward in Faith movement. Mass is celebrated on each weekday at 12.30pm.
