The New York Historical Society has brought a couple of paintings out to the streets. The mini installation of sorts is comprised of their portraits (replicas, of course) of Abraham Lincoln and Peter Cooper; both are currently on display at the Astor Place Triangle.
They note the significance of the location, saying "the Astor Place Triangle stands directly opposite The Cooper Union: the distinguished school established by Peter Cooper in 1859, and the place where Abraham Lincoln delivered the defining speech of his Presidential campaign in 1860. Informational texts accompanying the large-scale portraits of Cooper and Lincoln explain the links between these two figures and the site, bringing art and history to life in the city."
You can take a look at the outdoor free-standing exhibit through August 23rd. The NYHS also hopes to launch a series of outdoor installations throughout the city next year, to coincide with the celebration of the 400th anniversary of the founding of New York.