Changing Skyline: Singh Center enlivens Penn campus

Modern architects have a long tradition of trying to reimagine the relationship between buildings and nature. Philip Johnson famously designed the walls of his Glass House so it appears that only the barest membrane separates its occupants from the rolling Connecticut countryside. At Fallingwater, Frank Lloyd Wright envisioned the house's cantilevered terraces growing organically from the boulders over the thundering Bear Run torrent.