When one speaks about the historic buildings of New York City, images of the stately brick rowhouses of Brooklyn, the cast-iron office buildings of SoHo, and the elaborate mansions of 5th Avenue come to mind. But the interesting architecture of the city is not limited to buildings constructed before 1900 in a classical style. Buildings built in the modern styles in the middle of the 20th century dot the streetscape and range from tall office buildings, to transportation structures, to private residences. These Mid-Century Modern buildings with their unique shapes, unusual massing, and uncommon materials (at least uncommon compared to architecture that came before) stand out from the earlier masonry buildings and the contemporary glassy structures that surround them.