Les Quatre Cents Coups

This photo was taken with my cameraphone today in Midtown. Any idea where I was? The first person to email me with the correct answer wins a Lux Lotus prizepack! P.S. There's also a giveaway in The Smart Set.

Update: The winner is Fette, who identified the fact that I was "looking at a Donald Judd piece(s)!" (Location: the Christie's show of his work).