An Alfred Stieglitz photo of this building taken from a snowy Madison Square Park juxtaposes a narrow, leafless tree with the narrowness of one corner of this building, though most photographs depict that narrow corner, formed by the intersection of Fifth Avenue and Broadway from head-on.
Elizabeth McCausland described this building as "a modern Tower of Pisa" in an originally unpublished caption to a close-angle photo in which one corner of this building appears to stretch up and tilt to the right. Walter Gropius shot this building from an up-turned, diagonal angle, giving the illusion that it is falling to the left. The former photo is in Berenice Abbott's collection Changing New York. A  lamppost is the only in-focus object in a photograph of this building taken as Alvin Coburn Langdon kicked his tripod and Edward Steichen produced three autochromes of this building in which it towers over three carriages passing along wet pavement. An Alfred Stieglitz photo of this building taken from a snowy Madison Square Park juxtaposes a narrow, leafless tree with the narrowness of one corner of this building, though most photographs depict that narrow corner, formed by the intersection of Fifth Avenue and Broadway from head-on. For 10 points, name this New York City building with a distinctive triangular shape. 
Elizabeth McCausland described this building as "a modern Tower of Pisa" in an originally unpublished caption to a close-angle photo in which one corner of this building appears to stretch up and tilt to the right.
Flatiron Building 