Question: In which year was this county and municipality founded, where the Norwegian jazz orchestra Batagraf is based?

Context articles: Atle Nymo
Batagraf
All My Yesterdays
Oslo
Buddyprisen
Mathias Eick
Odin Records
Opening Night (album)
Westchester Jazz Orchestra
Norsk Jazzforum

Atle Nymo (born 9 June 1977 in Valnesfjord near Fauske, Norway) is a Norwegian jazz musician (tenor saxophone and bass clarinet), and the younger brother of Jazz saxophonist Frode Nymo.
 He is known for his contributions with the orchestras Motif, one of his main projects, and Trondheim Jazz Orchestra in which he has worked with Jazz greats like Pat Metheny and Chick Corea.
Batagraf (established 2005 in Oslo, Norway) is a Norwegian jazz orchestra, created and led by Jon Balke.
 In 2009 they attended the Nattjazz in Bergen with the entertainers Are Kalvø and Espen Beranek Holm, two of Norway's most popular radio personalities, for the show «Pratagtaph» gaining brilliant reviews.
All My Yesterdays is a big band jazz recording of the Thad Jones/Mel Lewis Jazz Orchestra playing at the Village Vanguard club in New York City in February and March 1966.
 The February 7 tracks are the first recordings of the group at this club although the recording was not released until 2016.
 A 50-year tradition for Monday nights at the Village Vanguard began from this first evening for the Thad Jones/Mel Lewis Jazz Orchestra which later became the Mel Lewis Jazz Orchestra and eventually the Vanguard Jazz Orchestra.
Oslo ( , , ] ] ] ) is the capital and the most populous city in Norway.
 It constitutes both a county and a municipality.
 Founded in the year 1040, and established as a "kaupstad" or trading place in 1048 by Harald Hardrada, the city was elevated to a bishopric in 1070 and a capital under Haakon V of Norway around 1300.
 Personal unions with Denmark from 1397 to 1523 and again from 1536 to 1814 and with Sweden from 1814 to 1905 reduced its influence.
 After being destroyed by a fire in 1624, during the reign of King Christian IV, the city was moved closer to Akershus Fortress and renamed Christiania in the king's honour.
 It was established as a municipality ("formannskapsdistrikt") on 1 January 1838.
 Following a spelling reform, it was known as Kristiania from 1877 until 1925, in which year its original Norwegian name of Oslo was restored.
Buddyprisen (established 1956 in Oslo, Norway) is an award, given annually by the Norwegian Jazz Forum to a Norwegian jazz musician that has "been an excellent performer and significantly involved in Norwegian jazz by other means".
Mathias Eick (born 26 June 1979) is a Norwegian jazz musician, and the brother of the jazz musicians Johannes Eick and Trude Eick.
 He is mainly known from his releases on the jazz label ECM Records.
 His main instrument is the trumpet, but he also plays upright bass, vibraphone, piano and guitar.
 He has performed with several well-known music groups and musicians, e.g. Jaga Jazzist, Manu Katché, and "Trondheim Jazz Orchestra" together with Chick Corea and Pat Metheny.
 Besides this he is also known for his collaboration with Norwegian singer-songwriter Thomas Dybdahl, and recordings with the Norwegian bands Turboneger, DumDum Boys, Motorpsycho, D'Sound and Bigbang.
Odin Records is a Norwegian jazz record company and label founded in 1981 by the Norwegian Jazz Federation, when there were not many independent record labels in Norway.
 Only major international record companies were to be found in Oslo, so Odin soon became the most important national label for contemporary Norwegian jazz.
Opening Night is a big band jazz recording of the Thad Jones/Mel Lewis Jazz Orchestra playing at the Village Vanguard club in New York City in February 1966.
 This was the first performance of the group at this club although the recording was not released until 2000.
 A 50-year tradition for Monday nights at the Village Vanguard began from this first evening for the Thad Jones/Mel Lewis Jazz Orchestra which later became the Mel Lewis Jazz Orchestra and eventually the Vanguard Jazz Orchestra.
The Westchester Jazz Orchestra is a 16 piece concert jazz orchestra based in Westchester, New York currently conducted by jazz pianist and composer Mike Holober.
 The orchestra has been critically acclaimed by "The New York Times", "Down Beat", and "JazzTimes".
 The Westchester Jazz Orchestra was honored as a runner up for "Best Big Band" in the 2011 JazzTimes readers' poll.
 The ensemble operates as a non-profit artistic entity based in the Westchester County region of New York.
Norsk Jazzforum or The Norwegian Jazz Forum (originally established in 1953, and later reappeared on June 8, 1997 in Oslo, when The Norwegian Jazz Federation and Association Norwegian Jazz Musicians fused into The Norwegian Jazz Forum) is a member and interest organization that gathers the Norwegian jazz community, and works to promote the Norwegian jazz in terms of cultural policy and the arts.