The Washington Park Subdivision is the name of the historic 3-city block by 8-city block subdivision in the northwest corner of the Woodlawn community area, on the South Side of Chicago in Illinois that stands in the place of the original Washington Park Race Track. The area evolved as a redevelopment of the land that the track had previously occupied. It was originally an exclusively white neighborhood that included residential housing, amusement parks, and beer gardens. During the late 1920s and 1930s, the area became the subject of discriminatory twenty-year covenants, which were determined to be invalid by the United States Supreme Court, when challenged in a seminal case by Carl Hansberry. The case is a vital part of legal studies and considered an important part of a broad class of histories. The play Raisin in the Sun is based on Lorraine Hansberry's struggles in this neighborhood.