This is a list of choirs that sing at least part of their repertoire in a Celtic language.
 Celtic Choirs keep alive Celtic music traditions and language, bringing them to a wider audience and reinforcing the learning of Celtic languages.
 Choirs compete at Celtic festivals such as the National Mod in Scotland and Welsh Eisteddfod.
 The London Welsh Male Voice Choir and the London Welsh Rugby Club Choir sang the Olympic Anthem at the Closing Ceremony of the 2012 London Olympics.
 For choirs in the UK, please see the separate entries for each country.
The City of Bath Male Choir is a male voice choir from Bath, Somerset.
 The choir came to national prominence in the UK when they came 5th in the Last Choir Standing competition run by BBC television, appearing live on BBC TV on three successive Saturday nights on prime time television during July and August 2008.
 They have sung with Aled Jones(twice), Jamie Cullum, Clare Teal, Alfie Boe and Rhiannon Lambert and on 11 December 2009, performed with Clive Anderson, Max Clifford, Rudolph Walker and Barrie Rutter for the Prostate Cancer Charity in St. John's Church, Westminster
The Male Choir of St Petersburg is a Russian choir that moved to the City of St Petersburg in the 18th century from Moscow.
 At the end of the 19th Century the choir numbered 90: 40 adults and 50 boys (women were not admitted).
 Of the 22 basses, 7 were bassi profundi, most notably Vladimir Pasyoukov and Vladimir Miller, who were capable of reaching bottom G easily.
 The choir utilized private study with Italian methods.
Ntaria Ladies Choir (or Hermannsburg Ladies Choir) is a choir from Hermannsburg in Central Australia.
 The members are aboriginal women from the area and they sing a mixture of English and Arrente.
 The choir has its roots in work done by Lutheran Pastors Kemp and Schwartz in 1887 They created an Arrente language hymn book from which the choir sang in the early years.
 Other choirmasters have included Pastor Carl Strehlow, Pastor Paul Albrecht and the current choirmaster Pastor David Roenfeldt.
 Since 1970 it has been a ladies only choir.
 Albert Namatjira may have sung with the choir in the 1950s.
The 1973 CECAFA Cup was the inaugural edition of the CECAFA Cup, and was held in Uganda.
 The CECAFA Cup is considered Africa's oldest football tournament, and involves teams from Central and Southern Africa.
 The matches in the 1973 tournament were played from 22 September 1973 until 29 September 1973.
 The tournament was originally the Gossage Cup, contested by the four nations of Kenya, Uganda, Tanzania, and Zanzibar, running from 1929 until 1965.
 In 1967, this became the East and Central African Senior Challenge Cup, often shortened to simply the Challenge Cup, which was competed for five years, until 1971, before the CECAFA Cup was introduced in 1973.
 Uganda, the hosts, won the Cup, beating Tanzania 2–1 in the final.
 The tournament lacked a third-place play-off, so the runners-up in the group stages, Kenya and Zambia, shared third place.
 After Uganda and Zambia drew in the group stages with the same number of points, goals conceded and goals scored, a play-off occurred, which Uganda won.
 The tournament has been expanded, and the modern-day tournament consists of 12 different teams (Ethiopia, South Sudan, Burundi, Rwanda, Sudan, and Eritrea have joined since 1973).
Alfred Giovanni Roncalli "Alfie" Boe (born 29 September 1973) is an English tenor and actor, notably performing in musical theatre.
Thomas Linley (17 January 1733 – 19 November 1795) was an English tenor and musician active in Bath, Somerset.
 Born in Badminton, Gloucestershire, Linley began his musical career after he moved to Bath at age 11 and became apprentice to the organist Thomas Chilcot.
 After his marriage to Mary Johnson in 1752, Linley at first supported his wife and growing family predominantly as a music teacher.
 As his children grew and he developed their musical talent, he drew an increasing amount of income from their concerts while also managing the assembly rooms in Bath.
 When the new Bath Assembly Rooms opened in 1771, Linley became musical director and continued to promote his children's careers.
 He was eventually able to move to London with the thousands of pounds which he had amassed from their concerts.
Hannu-Markus Tapio Norjanen (Mynämäki, 25 February 1964) is a conductor and has worked as the conductor of the Helsinki Cathedral Boy's Choir Cantores Minores since 2005.
 He is also a part of the Cantores Minores head council.
 In the years 1990-1997 Norjanen worked as the conductor of the male choir Amici Cantus, and during 2006-2011 as the conductor of Helsinki Philharmonic Choir.
 In the years 1998-2001 he was the main conductor of the city orchestra of Lappeenranta.
 Norjanen graduated from the Sibelius Academy as an organist (1990), choir director (1992), and as a conductor in 1997.
 Norjanen has also been taught by Eric Ericson and studied conducting in Sweden.
 He was appointed the conductor of the Tapiola Chamber Choir.
Lauri Porra (born December 13, 1977) is a Finnish bassist and composer, best known for his work in Stratovarius and Sinergy.
 Lauri Porra is a fourth generation musician, and the great-grandson of famous Finnish composer Jean Sibelius.
 He started to study music at age 6 when he started to play cello in a local music school.
 In 1993 he switched to bass guitar and continued his studies in the Helsinki Pop Jazz Conservatory (1994–2004).
 Additionally he has taken lessons on piano, double bass, trumpet and male vocals.
 During 1997-1999 he sang with the renowned YL male choir performing for instance with the London Symphony Orchestra.
 He has released three instrumental solo albums.
 He has also composed music to numerous movies, tv-series and commercial spots.
 Lauri´s Entropia concerto for electric bass and orchestra was premiered by Lauri Porra and Lahti Symphony orchestra in 2015.
 In 2016 Lauri was nominated for HARPA nordic film composer music award.
 Lauri won the VOITTO-prize for the best advertisement music of the year in 2016 for his music in Visit Finland´s Polar Night Magic spot.
The Chor von St. Bonifatius (Choir of St. Boniface) is a German mixed choir, the church choir of the parish St. Bonifatius, Wiesbaden.
 It was founded in 1862 as a male choir and was a mixed choir from 1887.
 Since 1981 it has been conducted by Gabriel Dessauer, who founded two children's choirs.
 The group sang the first performance in Germany of John Rutter's "Mass of the Children" and performed in Azkoitia, San Sebastián, Görlitz, Bruges, Macon and Rome.
 Colin Mawby composed for the choir the Missa solemnis "Bonifatius-Messe" for the 150th anniversary, celebrated on 3 October 2012.

Question: The City of Bath Male Choir sang with which English tenor and actor born on 29 September 1973?
Answer: Alfred Giovanni Roncalli "Alfie" Boe