The Comcast Technology Center (Foster + Partners) in downtown Philadelphia is nearing completion. It’s not open yet, but its impact on the skyline is already apparent. Meh. The most that can be said about it is that it recalls a De Stijl composition of overlapping boxes. But the glass boxes—the building is all glass, of course—lack refinement and look as if a preliminary concept sketch had been rushed into construction. The clumsiest element is the optimistically named “lantern.” There are many interesting skyscraper tops, such as the mooring mast atop the Empire State Building, or the Chrysler Building’s Art Deco spire, but the illuminated Comcast top only looks good at night (like most all-glass buildings). During the day it is a dud, an awkward prism.

The 34-story Alexander tower (Robert A. M. Stern Architects) is much more successful. Although a local architecture critic scoffed at the “wedding cake” design, the nice thing about a wedding cake is that the design supports an interesting top. The Alexander doesn’t make a big deal of its top, but it steps back subtly in an interesting way and is surmounted by a sort of laid-back Mayan temple. Just to the left in the photograph you can see a building from the golden age of skyscraper design, the Elverson Building (Rankin, Kellog & Crane), built by the Philadelphia Inquirer in 1924. The pinnacle is an octagonal temple with a golden dome, a memorable topper for a building housing the city’s main newspaper, when urban daily newspapers were still important. I suppose that, in that sense, the banal Comcast Center suits a corporation that owns the company that created Days of Our Lives and America’s Got Talent.