sentences:  After eight years the structure was stabilized and a roof placed overhead for protection.The semi-circular Ionic portico of the Château de Rastignac is frequently compared with Maison carrée d'Arlac and the South Portico of the White House, and there have been speculations about the possible influences of one house on the other.The first official White House guide, published in 1962, suggested a link between Hoban's design for the South Portico and Château de Rastignac.