to support tension, were used to replace the flying buttresses of previous structures. West front The west front is composed of a porch two levels high, beneath a flamboyant Gothic rose window installed in the upper chapel in the 15th century. At the top is a pointed arch an oculus window, and a balustrade around the bottom of the roof, decorated with interlaced fleur-de-lys emblems placed by Charles V of France. On either side of the porch are towers which contain the narrow winding stairways to the upper chapel, and which also hide the buttresses. The spires of the towers are also decorated with royal fleur-des-lys beneath a sculpted crown of thorns. This decoration dates to the 15th century, and was restored in about 1850 by Geoffroy-Dechaume. The portal of the upper chapel is located on the balcony of the upper level. The original sculpture of the west portal was smashed during the Revolution. It was restored by Geoffroy-Dechaume between 1854 and 1873. Spire The current spire, high, is the fifth to be built at Sainte-Chapelle since the 13th century. The appearance of the first is unknown, but the second, built in 1383 under Charles V, is pictured in an illustration of the Tres Riches Heures du Duc de Berry. He replaced it with another in about 1460, but this spire burned in 1630. It was replaced by another, which was destroyed following the French Revolution in 1793. The present spire was built of cedar wood by the architect Lassus beginning in 1852. The sculpture decorating the spire was designed in 1853 by Geoffroy-Dechaume. The painter-designer Steinheil designed the sculpture at the base of the spire, and his face appears as two of the apostles, Saint Thomas and Saint Bartholomew. Above the gables are statues representing angels carrying the instruments of The Passion. Above the chevet is a statue of the Archangel Michael slaying a dragon. Around the feet of the archangel are sculptures, also designed by Geoffroy-Dechaume, of eight persons, portrayed by workers of the reconstruction, laying wreaths at the Archangel's feet. Interior Saint Chapelle, built to house a reliquary, was itself like a precious reliquary turned inside out (with the richest decoration on the inside). Although the interior is dominated by the stained glass (see below), every inch of the remaining wall surface and the vault was also richly coloured and decorated. Analysis of remaining paint fragments reveals