A brownstone is a type of residential building commonly found in urban areas, particularly in cities like New York City. These buildings are typically made from a reddish-brown sandstone, which gives them their distinctive color and name. Brownstones are often characterized by their three to four stories, large windows, and decorative architectural details, making them popular among homeowners and renters alike. Originally built in the 19th century, brownstones were designed to accommodate growing populations in cities during the industrial era. Many of these buildings have been preserved and renovated, maintaining their historical charm while offering modern amenities. Today, they are sought after for their unique style and proximity to city life.