facades at 57th and 56th Streets also contain glass and metal storefronts, although there are loading docks on the far western section of the 56th Street facade. The base contains six pylons, which are supported by stone pedestals with sculptural groupings at the third story, and are topped by sculpted urns above the sixth story. The pylons indicate that the building was originally planned as a theater structure. The centers of the Eighth Avenue and 57th Street facades each contain two pylons and are identical. The left pylon on both entrances contains sculptural groups of "Comedy and Tragedy", while the right pylon contains sculptural groups of "Music and Art". Similar pylons rise in front of the northeast and southeast corners of the base. The northeast-corner pylon contains a group representing "Printing and the Sciences", while the southeast-corner pylon contains a group representing "Sport and Industry". Between the pairs of pylons on Eighth Avenue and on 57th Street, at each of the third through sixth stories, is a tripartite window with fluted stone spandrels. The Eighth Avenue and 57th Street elevations contain seven bays on either side of the vertical bay, which are set back above the second story. The windows on the third through fifth stories of these elevations are sash windows, slightly recessed behind the main facade, while the sixth-story windows are flush with the cast stone facade. The setback and window arrangement are carried around to the easternmost eight bays on 56th Street. The westernmost two bays on 57th Street, and the westernmost twelve bays on 56th Street, do not set back above the second story, and do not contain third-story balustrades. On the western section of the 56th Street facade, the third through fifth stories are grouped into six pairs, which are separated by pilasters. The pilasters were designed to emphasize the long-unbuilt upper stories. Tower A clerestory wraps around the seventh through tenth floors, atop the base, structurally separating the tower stories from the base. Above the tenth floor, the tower's facade uses a triangular framing pattern known as a diagrid, which serves as the structural support system for the tower stories. The diagrid divides the tower's sides horizontally, into segments of four stories, and diagonally, into alternating upright and inverted triangles, which intersect at "nodes" along various points of the facade. There are no vertical columns within the tower's footprint. The arrangement of the diagrid