Pacific Park is a mixed-use commercial and residential development project which consists of 17 high-rise buildings, under construction in Prospect Heights, adjacent to Downtown Brooklyn and Fort Greene in Brooklyn, New York City. The project overlaps part of the Atlantic Terminal Urban Renewal Area, but also extends toward the adjacent brownstone neighborhood. Of the 22-acre (8.9 ha) project, 8.4 acres (3.4 ha) is located over a Long Island Rail Road train yard. A major component of the project is the Barclays Center sports arena, which opened on September 21, 2012. Formerly named Atlantic Yards, the developer renamed the project in August 2014 as part of a rebranding. Ongoing construction on the residential part of the project has yet to commence. Development is overseen by the Empire St