Following the death of Espérandieu on September 11, 1874, Henri Révoil was charged with finishing the interior of the basilica, in particular the mosaics. The construction of the major crypt and installation of the mosaics in the choir was carried out in 1882. Unfortunately a fire on June 5, 1884 destroyed the altar and the mosaic in the choir; moreover the statue of the Virgin was damaged. The statue and the mosaics were restored and the altar was rebuilt according to the drawings of Révoil. On April 26, 1886 cardinal Charles Lavigerie consecrated the new crypt. In 1886, walnut stalls were built in the choir; the last mosaics in the side vaults were finished between 1887 and 1892. In 1897, the two bronze doors of the upper church and the mosaic above them were installed and the statue of the Virgin was regilded for the first time. Final completion of the basilica thus took place more than forty years after the first stone was laid.