This is one of the iconic buildings of New York – people who have probably never heard of Alfred Stieglitz were bringing out their cell phones to take photos of it. But it's also a very cluttered urban environment, and getting a clean view of it is exceedingly difficult.
Putting this much emphasis on the corner of the frame isn't usually a sensible thing to do with Nikon's AF-S 50/1.4, even at f/5.6. In this case I've processed the photo through DxO Optics, a badly named program that does a very good job with correcting lens deficiencies. It makes a noticeable difference on the architectural details in this photo.