A monument, officially called the "Altar to the Homeland" ("Altar a la Patria"), honors the "Niños Héroes" – the Heroic Cadets of the Battle of Chapultepec – with a particularly grand monument in the entrance of Chapultepec Park. Heroes of South American independence include Simón Bolívar and José de San Martín. There is also a fountain with sculptures that commemorate the nationalization of Mexico's oil reserves and industry in 1938, and the Diana the Huntress Fountain that includes a statue featuring the Roman goddess Diana originally named "The Arrow Thrower of the North Star".