The north aisle with its lateral chapels is of later date than the fifteenth-century work in the nave, and the architecture is of a more pleasing character. The general design is much the same as that of the south aisle, but the details differ considerably: instead of clustered columns we have here richly-moulded prismatic piers. Save those of the first two bays, which are of earlier date than the rest, they are all adorned with capitals. Hendrick Cooman, who was master mason of Saint Gudila's from 1460 to 1470, probably designed the bays without capitals, and the other bays are most likely the work of his successor, Jan Vandenberg, the builder of the Town Hall, or, to be accurate, of a considerable portion of it, and who also designed the upper church at Anderlecht, where all the columns have capitals. He directed the works at Saint Gudila's till his death in 1485, and the richly sculptured balustrade which surrounds the roof of the nave is attributed to him. The tracery of this feature is in form unique, and more curious than beautiful. It consists of a series of _K_'s, an allusion, perhaps, to the name of the reigning Duke, Karel de Stout (Charles the Bold), or perhaps to Karlekin, as the Flemings called Charles V., but of course in the latter case it cannot be Vandenberg's work. Though Hendrick Cooman was not so famous an architect as his successor, Jan Vandenberg, he seems to have done very well for himself in his profession, and to have been a man of consideration in the city of Brussels. He was four times a member of the Town Council: in 1448, 1451, 1458 and 1461, and in 1468 he was named burgomaster. There were two burgomasters in Brussels, it should be borne in mind. One represented the patricians and the other the plebeians, and in all probability Hendrick Cooman was second burgomaster. The name of the mason who succeeded Vandenberg should be held in perpetual remembrance. He designed the beautiful porch, much marred by restoration, which gives entrance to the south transept--Jan Vereycken. He occupied the position of master-mason until his death, which took place somewhere about the close of the century, and if he did not actually complete the Church of Saint Gudila, he at all events brought it within measurable distance of completion.