. Oslo Ita ce birnin kasar Norway, an kirkire ta a shekara ta 1040 da suna "Anslo", kuma ita ce birni mafi yawa a Norway. Ta hada da county da kuma municipality. an kafa ta ne a matsayin kaupstad ko wurin kasuwan ci a 1048 daga Harald Hardrada, sannan aka maida birnin tazama bishopric a 1070 kuma babban birni a karkashin Haakon V na Norway a shekara kusan 1300. Personal Unions da kasar Denmark daga 1397 to 1523 da kuma 1536 zuwa 1814 da kuma tare da Sweden daga 1814 zuwa 1905 ta zamanto matsayin birnin kasashen biyu. Bayan ƙonewar birnin da wuta yayi a 1624, lokacin mulkin King Christian IV, sai aka Gina sabon birni a kusa da Akershus Fortress sannan aka Sa mata suna Christiania saboda girmama sarkin. Ta kasan ce an kafata ne a matsayin municipality (formannskapsdistrikt) a 1 January 1838. Kuma ana rubuta sunan birnin da Kristiania tsakanin 1877 da 1897 daga hukumomin jiha da ta birane. A 1925 an sauya sunan birnin da Oslo. Oslo ita ce cibiyar tattalin arziki kuma cibiyar gwamnatin Norway. Kuma birni har wayau nan ne tushen kasuwancin Norwegian, bankuna, masana'antu da jigilolin jiragen ruwa.