In the 19th century, the view of Lower Manhattan from Brooklyn Heights first became recognizable as the modern “skyline” of New York City. The development of South Street Seaport and the popularity of panorama images attracted travelers to the city and to Brooklyn Heights. The skyline, as many outsiders’ first impression of New York, became a focus of artists and historians. Walt Whitman, in particular, immortalized the developing New York through his poetry, capturing both the essence of the city and the people within it. The implementation of the grid system in 1811 permanently altered the topography of New York City, and consequently altered the skyline itself.