Grand Prospect Hall is a large Victorian banquet hall in Park Slope, Brooklyn, New York. Local entrepreneur John Kolle built this ornate palace in 1892. Kolle hired a young architect, Ulrich J. Huberty, creator of Prospect Park's renowned boathouse, tennis house, and Litchfield Villa. It is a four story building faced in buff-gray brick in the French Renaissance style. It features pressed metal decoration originally painted in imitation of limestone. It was listed on the National Register of Historic Places in 1999.