Brooklyn Heights was the first neighborhood protected by the 1965 Landmarks Preservation Law of New York City. The neighborhood is largely composed of blocks of picturesque rowhouses and a few mansions. A great range of architectural styles is represented, including Greek Revival, Italianate, Second Empire, Victorian Gothic, Romanesque, Neo-Grec, and Classical Revival, as well as a few 2/1/2-story late Federal houses from the early 19th century in the northern part of the neighborhood. Some houses were constructed of brick, but the dominant building material was brownstone or "Jersey freestone", a reddish-brown stone from Passaic County, New Jersey.