Deigned by the Philadelphia architectural firm KieranTimberlake*, the chancery building incorporates a number of sustainable design elements, and has been generally well received (international politics aside) by staff and local residents. It replaced a mid-century modern structure (by Eero Saarinen, now being redeveloped as a hotel) in the more traditionally fancypants Grosvenor Square neighborhood.* Coincidentally, also the designer of Penn's Levine Hall, where I once had my office.