Architecture of New York City spread outward from where it originally began at the southern-tip of Manhattan Island into surrounding areas. In order to house the burgeoning population, farm land and open space in Upper Manhattan, the Bronx, Queens, Brooklyn, and Staten Island were developed into neighborhoods of brownstones, apartment buildings, multi-family and single-family homes. The density of this new construction generally depended on the area's proximity and accessibility to Manhattan. The development of these areas was often spurred by the opening of bridges and the connection of boroughs via public transportation. For example, the Brooklyn Bridge was completed in 1883 and connects Brooklyn and
Demographics of New York City settled along Ocean Parkway in Brooklyn creating a unified community consisting of about 75,000 people in this area, while the other Sephardic Jews live in the Upper East Side of Manhattan and in Staten Island. 19th-century Jewish immigrants settled mainly in the tenement houses of the Lower East Side of Manhattan. New York City's current Jewish population is dispersed among all the boroughs; Brooklyn's Jewish population in 2011 was estimated as 561,000, and Manhattan's was 240,000. The Orthodox community is rapidly growing due to higher birthrates among Orthodox (especially Hasidic) Jews, while the numbers of Conservative and Reform Jews are