In which year was this county and municipality founded, where the Norwegian jazz orchestra Batagraf is based?
Batagraf: Batagraf (established 2005 in Oslo, Norway) is a Norwegian jazz orchestra, created and led by Jon Balke. Oslo:  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.
i don't know