Which is the only Alaskan city to have been governed under four flags?

Having been Tlingit territory and then under the jurisdiction of Russia, Great Britain, and the United States, Wrangell has the unique status as the only Alaskan city to have been governed under four "flags".

The City and Borough of Wrangell is a borough in the U.S. state of Alaska. As of the 2010 census the population was 2,369. Incorporated as a Unified Home Rule Borough on May 30, 2008, Wrangell was previously a city in the Wrangell-Petersburg Census Area (afterwards renamed the Petersburg). Its Tlingit name is Ḵaachx̱aana.áakʼw (“Ḵaachx̱an’s Little Lake” with áa-kʼw ‘lake-diminutive’). The Tlingit people residing in the Wrangell area, who were there centuries before Europeans, call themselves the Shtaxʼhéen Ḵwáan after the nearby Stikine River. Alternately they use the autonym Shxʼát Ḵwáan, where the meaning of shxʼát is unknown.