Mary Sargent © 2009 ………………….. click to enlarge
This is the U.S. Courthouse, built by Cass Gilbert during 1932-36 in a neoclassical style, about 10 years after the New York County Courthouse was built. He went from neogothic (the Woolworth building) to neoclassic in one lifetime. Moreover, this was one of the first federal skyscrapers ever, so I guess we could call it neoclassically clad modern. No! Don't listen to me. Rather go to the GSA site for lots of good information about the courthouse.
By the way, it was renamed in 2001 for the late Supreme Court Justice, Thurgood Marshall, so it's officially the Thurgood Marshall U.S. Courthouse, but I don't think anyone calls it that, including, obviously, me.