“Recent advances in material technology and parametric design have given architects freedom to create exteriors of almost limitless variation. As a result, the enclosure has become a transformational building element, where cladding a building can give it a new visual identity and radically improve its energy performance in the process. Yet when a project involves recladding one of a city’s most recognized landmarks, preservation often comes at the expense of innovation. Preserving the original identity—not altering it—is foremost in the minds of designers.”