![](https://www.nydailynews.com/wp-content/uploads/2025/02/sign5.jpg?w=1024&h=924)
‘Signs of the Times’ markers map out Harlem’s rich Black history
Outside the Washington Heights branch of the New York Public Library in Manhattan stands a metal post topped with an unassuming blue plaque bearing golden letters — an easily overlooked marker that’s actually a window into Harlem’s storied past. Bearing …