One small correction: the seal on the New York City flag is that of the city, not of the state. But the main reason for my post is to relate the touching and little known backstory behind the two flagpoles on the library plaza. Both poles are monuments to onetime New York City mayor John Purroy Mitchel. Mitchel, who was called "the Boy Mayor" because of his young age, was an honest, well-liked, reform-minded public servant. But his policies displeased many Tammany machine politicians, and they launched an aggressive counter campaign that deprived Mitchel of a second term. Soon after Mitchel's failed reelection bid, the U.S. entered WWI, so the former mayor decided to join the war effort. He volunteered for the Army Air Corps and was killed in a flight training accident in Louisiana. (According to some accounts, he failed to secure his seat belt and fell to his death performing some aerial maneuver -- a common mishap, I've been told by an aviation historian I know.) Mitchel was greatly admired for having died in the service of his country, and even though he was buried in a very modest grave in Woodlawn Cemetery in the Bronx, he was honored with several civic monuments. Mitchel Air Field on Long Island, for example, was named for him, and the entrance to Central Park at Fifth Ave. and 90th Street (featuring a gold bust of the man) was dedicated to his memory. Which brings us to the NYPL flagpoles. They are identical in every way, and yet their inscriptions are different -- which might seem odd since they commemorate the same man. But it all makes sense when you study the plaques at the foot of each pole. You see, the northern flagpole, which flies the *city* flag, is dedicated to John Purroy Mitchel the former NYC mayor; the southern flagpole, which flies the *American* flag, is dedicated to John Purroy Mitchel the fallen U.S. serviceman.