During the long peace which Brussels enjoyed from the closing years of the Warrior's reign to the end of the reign of his great-grandson, Duke John the Victorious, the building operations at Saint Gudila's were carried on continuously, but the progress made was comparatively slow, for the Dukes were often short of cash, and were obliged to have recourse to all kinds of expedients to raise the necessary funds. In 1273, however, the chancel was completed and the greater part of the transept, and it is most likely that in the same year the old church was pulled down. All the work done during this period may be described as First Pointed. The tracery of the clerestory windows is, of course, flamboyant; it was substituted for the original tracery during the first quarter of the fifteen hundreds. In the course of the succeeding century the north aisle was added and the lowest stage of the nave, and at least the foundation of the towers, all this in the style then in vogue--Second Pointed. Here we have the work of three Sovereigns, John II., John III., and Duchess Jeanne, the last of the Sovereigns of Brabant of the old Louvain line. The building was completed by the Dukes of the Burgundian dynasty, and the distinctive features of Brabant architecture now become more emphasised. In the nave, for example, we have the beginning of that transformation of the triforium, which was so marked a feature in the Brabant style. Here it is still a separate story, still a passage in the thickness of the wall, but the arcading has completely disappeared, and in its place is a series of vertical bars which are simply a continuation of the mullions of the windows above. These are in the same plane as the triforium, and are only separated from it by bands of masonry so attenuated that they appear to be nothing more than transom bars. The effect is not happy: each section of the blind story with the corresponding section of the clerestory above, seems to be one huge window with the lower part bricked up. The exact date of this portion of the building is uncertain, but the nave must have been completed before 1446, for we know that in this year the Baroness de Heeze was condemned by Philippe l'Asseuré to fill the great west window with stained glass by way of a fine for having infringed the rights of the city. The present glass, however, is of much later date. It was presented by Everard de La Marck, Prince-Bishop of Liége, in 1528.