(Photo: NYC Municipal Archives; Peter Mauss/Esto)

33. Blue
105 Norfolk Street
Some fancy new architecture was inevitable and even desirable here, and it’s not as if Bernard Tschumi’s baublelike condo displaced any gems. But from a certain angle, the swollen blue thing looks disconcertingly like … well, like a sore thumb.

(Photo: From left: Courtesy of Ten Arquitectos; Rebecca Sahn)

34. One York
One York Street
Enrique Norten has plunked a crystal castle on top of a pale Civil War-era warehouse. That’s an attractively old-world approach: Pile the present on top of the past, making each adapt to the other. The pleasures of Canal Street living are still a little elusive, though.

(Photo: From left: Courtesy of the Morgan Library and Museum; Rebecca Sahn)

35. Morgan Library and Museum
225 Madison Avenue
In rethinking the Morgan, Renzo Piano harmonized its disparate pieces with poetic rationalism. In keeping with the institution’s tranquil dignity, the additions make no hucksterish moves but manage to unify the old buildings while emphasizing their separateness.