VI. Then at the very end of the Geometrical period the Lady chapel was built; at first detached from the east end of the choir, so as not to interfere with the services. Being exceedingly lofty and without aisles, it was possible to have exceptionally lofty windows of the type of those of the north transept of Hereford. These elongated windows, the absence of aisles, and the polygonal plan, give the exterior a curiously German appearance. The window tracery is Geometrical, being composed of groups of trefoils. But the ogee-dripstones of the windows show that the work overlaps into the Curvilinear period; indeed, it was not finished at Bishop Langton’s death in 1321. Under the three eastern windows are chapels, the central of which contains the monument of Bishop Selwyn, of New Zealand and Lichfield. But the glory of the Lady chapel and the cathedral is the magnificent painted glass of the sixteenth century—similar in character to the beautiful glass of Margaret of Austria’s church at Brou-en-Bresse, Burgundy. The first window on each side was inserted recently. The remaining seven windows are also Flemish glass, of the date 1530 to 1540, bought by Sir Brooke Boothby, in 1803, from the Cistercian nunnery of Herckenrode, near Liége, for £200. The second window on the north is particularly interesting, as it contains portraits of patrons and benefactors of Herckenrode, kneeling at altars, with their patron saints behind them. The third window also has portraits of great nobles of the Netherlands. The remaining five windows contain Scriptural subjects.