Question: In what year was the school at which Simon Brown was Head of Academic and Choral Music for 12 years awarded the UNESCO Mozart Medal?

Context articles: International Mozarteum Foundation
Simon Brown (musician)
Purcell School
Larry Nickel
Linden Lundstrom
1993 International Rostrum of Composers
Leonard Ratzlaff
Mozartinterpretationspreis
UNESCO Mozart Medal
William Dehning

The International Mozarteum Foundation (Internationale Stiftung Mozarteum) was founded in 1880 in Salzburg with its primary concern being the life and work of Wolfgang Amadeus Mozart.
 Closely affiliated with the Mozarteum University of Salzburg, it was preceded by the Cathedral Music Association and Mozarteum of 1841.
 It collects Mozart memorabilia, maintains the Mozart library (the Bibliotheca Mozartiana), the Mozart birthplace and other Salzburg locations linked with Mozart.
 The Foundation also promotes research regarding Mozart and administers various awards such as the Mozart Medal, the Preis der Internationalen Stiftung Mozarteum, the Lilli Lehmann Medal, and presents up to twenty other performances year-round.
Simon Brown was the director of music at King's College School in Cambridge from 1999-2014.
 and was the director of King's Voices from 2001 to 2013.
 He was a choral scholar in King's College Choir in the late 1970s, and since then has sung in the choirs of New College, Oxford, Winchester Cathedral, Westminster Abbey and Her Majesty's Chapels Royal (St James' Palace).
 His teaching career began at Bradford Grammar School in Yorkshire, and was followed by 12 years as Head of Academic and Choral Music at the Purcell School.
 His time at the Purcell School included conducting the youngest ever choir to sing Tallis' 40-part choral work "Spem In Alium".
The Purcell School for Young Musicians is a specialist music school for children, located in the town of Bushey, south Hertfordshire, England, and is the oldest specialist music school in the UK.
 The school was awarded the UNESCO Mozart Medal in 2003, which was received on behalf of the school by Prince Charles, who is a patron of the school.
 Sir Simon Rattle is honorary president of the school.
 Many of the pupils subsequently study at the Royal College of Music or Royal Academy of Music.
 In 2015, the School became the very first Fazioli Pianoforti Centre of Excellence.
Larry Nickel (born March 12, 1952) is a Canadian composer, conductor, music publisher and singer who devotes much of his focus to choral music.
 He is an associate composer of the Canadian Music Centre.
 and has composed for a wide spectrum of genres; electronic and computer music, string quartet, woodwind and brass quintet, Symphony Orchestra, Symphonic Wind Ensemble and choral ensembles, including both secular and ecclesiastical music.
 Primarily, he has written and arranged hundreds of compositions for choirs.
 Nickel also works as a choral clinician, occasional university professor, music minister, guest conductor and music festival adjudicator.
 Nickel sang professionally with the Vancouver Chamber Choir for six years, directed the Jubilate Vocal Ensemble for five years, and is currently singing with the Vancouver Cantata Singers.
 In 2010 Nickel became the owner and co-editor (with Diane Loomer) of Cypress Choral Music Publishing.
 Nickel's music is published by Oxford University Press, G. Schirmer, Shawnee Press, Pavane Publishing, Morton Music, Cypress Choral Music, Classica and Canadian International Music.
 The Canadian Broadcasting Corporation - CBC Radio - has featured his music many times.
Linden J. Lundstrom (1913–1996) of Rockford, Illinois, was an American choral conductor, arranger, author, publisher, and founder of Kantorei – The Singing Boys of Rockford, IL.
 Lundstrom grew up in Rockford, leaving in the 1930s to attend St Olaf College, Northfield MN, where he was greatly influenced by F. Melius Christiansen, founder of the St Olaf Choir.
 Upon graduation with a music degree, he returned to Rockford and to his first job, as choral director at the newly built Rockford East High School (1939).
 He remained there for some 35 years, but this was only one segment of his choral music influence, particularly among students.
 He was music director at First Lutheran Church, and later Our Savior's Lutheran Church (beginning 1958).
 With former student, Ronald Nelson, he self-published choral arrangements and curricula under the name Choir School Guild.
 In addition, AugsburgFortress published Lundstrom's "The Choir School: A Leadership Manual" in 1957.
 Lundstrom did further academic work in music at the University of Wisconsin, Madison.
The 1993 International Rostrum of Composers was the 39th edition of the forum.
 Finnish composer Kimmo Hakola won the UNESCO Mozart Medal with "Capriole", a 1991 composition for cello and double bass.
Leonard Peter Ratzlaff, CM, AOE (born January 27, 1949) is the choral conductor for Edmonton's Richard Eaton Singers.
 Born in Swalwell, Alberta, he obtained his graduate degree in choral conducting from the University of Iowa, and his doctoral dissertation on Anton Bruckner's "Te Deum" earned him the American Choral Directors Association Julius Herford Dissertation Prize.
 A professor of Choral Music at the University of Alberta since 1981, he also conducts the University of Alberta Madrigal Singers, and co-supervises the largest graduate program in choral conducting in Canada.
 His honors include induction into the City of Edmonton Hall of Fame, the Queen Elizabeth II Golden Jubilee Medal, the Queen Elizabeth II Diamond Jubilee Medal for distinguished service to Canadian choral music, induction into the Alberta Order of Excellence, induction as a Fellow of the Royal Society of Canada and being named to the Order of Canada.
 In 2011, he and RES celebrated 30 years of his leadership as conductor.
The Mozart Medal (Mozart Medaille) or Mozartinterpretationspreis was a music award named after Wolfgang Amadeus Mozart, administered by the Mozartgemeinde Wien (Vienna Mozart Society) and sponsored by the Austrian Ministry of Education and Culture.
 It was awarded from 1963 to 1999.
The UNESCO Mozart Medal is an award named after Wolfgang Amadeus Mozart and administered by UNESCO.
Dr. William John Dehning (August 13, 1942 - June 23, 2017) was an American conductor, teacher, and author who spent almost his entire career in the collegiate realm.
 He was known primarily for his work as conductor of the University of Southern California Thornton Chamber Choir and as author of the book, "Chorus Confidential: Decoding the Secrets of the Choral Art", published in 2003.
 Under his leadership, the Thornton Chamber Choir won seven prizes in international European competitions, including Grand Prizes in Varna, Bulgaria and Tours, France.
 After winning the choral competition with the USC Chamber Choir in Bulgaria, Dehning was awarded the Judges' Conducting Prize by a panel of ten judges in 1999.
 During his tenure, the ensemble also appeared at American Choral Directors Association (ACDA) conventions six times, including nationals in 2001 and 2005.
 They also completed a tour of East Asia in 2006, performing at the National Concert Hall in Taipei.
 While at Northern Michigan University from 1970–1972, Dehning was the founder of the Marquette Choral Society, which is still active.
 Later, he was from 1985-1995 the founder/conductor of the California Choral Company, a semi-professional chamber chorus that attained a reputation in Europe as well as in the United States.
 As Chairman of the USC Department of Choral Music (now retired), Dehning was awarded the first annual Dean’s Faculty Award for Excellence in Teaching, and he was also the 2007 recipient of the Thornton School's Ramo Award.
 Dehning was one of four founding members of the National Collegiate Choral Organization (NCCO), which held its first national conference in San Antonio in 2006.