At 1,800 square feet, the house designed by Stephen Kieran and James Timberlake of Philadelphia is the largest of the five. It comes closest to the spirit of the Breuer house, since it's a real home, with bedrooms, bathrooms, closets, a roof terrace, even a carport. But while Breuer was clearly designing for the suburbs, this five-story structure is intended for a small urban lot. The miniskyscraper seems just right for its Midtown location, with the Saarinen-designed CBS Building in the background. (Full disclosure: Kieran and Timberlake are both adjunct professors at the University of Pennsylvania, where I teach.)