Examine the =exterior= in detail from the court on the south side. More even than most Gothic buildings, the Sainte Chapelle is supported entirely by its massive piers, the wall being merely used for enclosure, and consisting for the most part of lofty windows. As in most French Gothic buildings, the choir terminates in a round apse, whereas English cathedrals have usually a square end. The beautiful light =flèche= or spire in the centre has been restored. Observe the graceful leaden angel, holding a cross, on the summit of the _chevet_ or round apse. To see =the façade=, stand well back opposite it, when you can observe that the chapel is built in four main stories,—those, namely, of the Lower Church or crypt, of the Upper Church, of the great rose window (with later flamboyant tracery), and of the gable-end, partially masked by an open parapet studded with the royal fleurs-de-lis of France. The Crown of Thorns surrounds the two pinnacles which flank the fourth story. The chapel consists of a lower and an upper church. The =Lower Church= is a mere crypt, which was employed for the servants of the royal family. Its portal has in its tympanum (or triangular space in the summit of the arch) the Coronation of the Virgin, and on its centre pillar a good figure of the Madonna and Child. Enter the Lower Church. It is low, and has pillars supporting the floor above. In the polychromatic decoration of the walls and pillars, notice the frequent repetition of the royal lilies of France, combined with the three castles of Castille, in honour of Blanche of Castille, the mother of St. Louis.