I love the lilac, lavendar blue gray color and patina on this door. I hope it stays this way for a while.
In front of the door is a triangle in the road that marks the site of an old Native American “castle”, so called because there was a wall around it. The door is at 5 Ninth Avenue, NYC.
The Ansonia, designed by noted architect Paul Duboy, opened in 1904 as a luxury hotel stretching along Broadway between 73rd and 74th streets. By the 1970s it was converted into rental apartments and it is now a designated Landmark on the Upper West Side.
A nice article with pictures is at http://www.thecityreview.com/uws/bway/ansonia.html