It has always been the custom at the consecration of a church to place a cross wherever the sign of the cross had been made by the bishop. The architect of the Sainte-Chapelle conceived the happy idea of placing the twelve Apostles as pillars of the Church, supporting these crosses, which are in the form of monstrances. The pedestals on which the figures stand are affixed to the pillars, and the statues, like the rest of the church, are painted and gilt, those of the 13th century being marvellous examples of the sculpture of that period. After the closing of the chapel these statues were sent to the Musée des Monuments Français; but when the Museum was suppressed they were dispersed or broken up. S. Peter was discovered in fragments at S. Denis, another was given to the church at Creteil, where it passed as S. Louis, and four were given to the missionaries for their Calvary at Mt. Valerien. The latter were in perfect preservation, and the colour had not disappeared. They remained at the entrance of one of the chapels of the Way of the Cross until 1830, when some senseless vandals threw them down and broke them; but the fragments were preserved, and are now in the garden of the Hôtel Cluny, a museum of fragments. The rest were replaced in the chapel, and are the fourth and fifth on each side facing the altar; all the others are new. The pavement is modern incised stone, with incrustations of colour, representing geometrical patterns, animals, and flowers. In the apse are subjects--the _Four rivers of Paradise_, and the _Seven Sacraments_ in the form of rivers. The altar is an exact copy of the original one. Above it is the tribune and canopy where the relics were exposed, with a spiral staircase leading up to it;[8] the northern one is ancient, and was found by Alexandre Lenoir, in the Musée des Petits-Augustins, where for half a century it had been attached to the _façade_ of the Château de Gaillon, a 16th century work, now in the court of the Ecole des Beaux-Arts. On one side of the apse is a very beautiful _piscina_. Part of the _baldachino_ is ancient, and the rest has been restored from old drawings.