20 Fenchurch Street
Photo © Bruce Damonte
Pittsburgh-based PNC Financial Services Group claims more green buildings than any other company in the world. Nationwide it has about 160 LEED projects, with several major ones on its home turf, including Three PNC Plaza (background), a glass-clad, 23-story mixed-use building by Gensler. When it opened in 2009, it was the first tower completed in the downtown core in more than two decades. The building has three programmatic elements'a hotel, condominiums, and office space'with separate but interconnected lobbies. It overlooks Market Square (foreground), a recently renovated public space surrounded by restaurants and retail that was the home of some of the city's early civic buildings, including the first Allegheny County Courthouse and the first jail.