Prospect Park South is a neighborhood in the New York City borough of Brooklyn, within the community of Flatbush. It is bordered by Church Avenue to the north, the Brighton Line (B & Q trains at present) of the New York City Subway to the east, Beverley Road (originally spelled Beverly) to the south, and between Stratford Road and Coney Island Avenue to the west. Prospect Park South is patrolled by the NYPD's 70th Precinct.
In 1899 visionary developer Dean Alvord created Prospect Park South as a community of substantial homes. The motto he chose for the development was rus in urbe (country in the city). Its location was selected to take advantage of the train service on the Brooklyn and Brighton Beach Railroad of the Brooklyn Rapid Transit Company (BRT). The line, now known as the BMT Brighton Line, offered express and local train service that remains to this day. The trains emerged at Fulton Street as an elevated line and continued across the Brooklyn Bridge to Manhattan.
The Alvord Mansion at 1522 Albemarle Road was built by Alvord for his family. Later, it was purchased by Israel Matz, founder of the Ex-lax Company. The Alvord Mansion burned down in approximately 1955 under mysterious conditions after its sale by the Matz family to apartment developers fell through in the face of community opposition.