Westchester Square (not a square at all,but a misshappen bit of land!) was a town, (now its a neighborhood/subway stop) that was the county seat of Westchester.

in the 1890's (1893 i think...) the City of NY, became the Greater City of NY, and incorporated, Brooklyn,(which was a seperate city, and some town) Queens(which had 3 small cities) Staten Island, and the Bronx (named for a neighborhood of souther westerchester county) into NY. Westchester county lost its county seat, which moved to White Plains.

Queens, extended past its current county line, and the eastern end of queens became Nassua county (the 2 or 3rd richest county (tax base) in NY state, something like 15th in the nation, and bankrupt-- they still outspent!)