Fugeddaboutit, it's the Brooklyn Flag

Quoted from Wikipedia:
Brooklyn (named after the Dutch town Breukelen) is one of the five boroughs of New York City. An independent city until its consolidation with New York in 1898, Brooklyn is New York City's most populous borough, with 2.5 million residents. If the borough were a separate city, it would be the fourth-largest city in the United States.


Brooklyn's official motto is Een Draght Mackt Maght. Written in the (old) Dutch language, it is inspired by the motto of the United Dutch Provinces and translated as "In Unity There is Strength." The motto is displayed on the borough seal and flag, which also feature a young robed woman bearing fasces, a traditional emblem of republicanism. Brooklyn's official colors are blue and gold.