Prospect Park is an urban park in Brooklyn, New York City. The park is situated between the neighborhoods of Park Slope, Prospect Heights, Prospect Lefferts Gardens, Flatbush, and Windsor Terrace, and is adjacent to the Brooklyn Museum, Grand Army Plaza, and the Brooklyn Botanic Garden. With an area of 526 acres (213 ha), Prospect Park is the second largest public park in Brooklyn, behind Marine Park.  First proposed in legislation passed in 1859, Prospect Park was laid out by Frederick Law Olmsted and Calvert Vaux, who also helped design Manhattan's Central Park, following various changes to its design. Prospect Park opened in 1867, though it was not substantially complete until 1873. The park subsequently underwent numerous modifications and expansions to its facilities. Several additions to the park were completed in the 1890s, in the City Beautiful architectural movement.   The Lafayette Memorial is a public memorial located in Brooklyn's Prospect Park in New York City. The memorial, designed by sculptor Daniel Chester French and architect Henry Bacon, was dedicated in 1917 and consists of a bas-relief of Gilbert du Motier, Marquis de Lafayette alongside a groom (speculated by some historians to be James Armistead Lafayette) and a horse.  This Divided Back Era postcard, mailed in 1921, is in good condition.  Art Post Card Co. Brooklyn. N.Y. No. 10578.