Flag of Oslo, Norway. This flag was created to the city anniversary in 2000 and is not approved by the Norwegian government. (Engene, Jan Oskar; "Nytt byflagg for Oslo? Noen kommentarer til tusenårsjubilantens 'særpregete' nye flagg." Nordisk Flaggkontakt 3-2000 pp. 31-33.)
Own work
Connormah