Philadelphia is a city of Colonial and ghostly architecture with narrow historic streets that open up onto vistas of bold, towering skyscrapers. It is a city of Greek Revival banks, Italian Renaissance, and Second Empire buildings, a city of Beaux-Arts hotels, Byzantine and Gothic churches, and International-style high-rises. A hybrid of gritty Chicago and pristine Boston, Philadelphia stands alone, an aristocrat in bib overalls, as a livable, intimate city of neighborhoods and luxurious townhouses, of hidden treasures and spectacular surprises. Philadelphia Architecture, a walk through Philadelphia streets past and present, highlights the richness and diversity of the city's architectural history.