The other chapel (_b_) I believe to be the one remaining evidence of the original plan of the chevet; and, looking at it in connexion with the other portions of the work, and especially with the blank wall between which and the cloister the new sacristy is built, it seems pretty clear that originally there were only three chapels in the chevet, and all of them pentagonal in plan. Between these chapels and the transepts there would then have been two bays of aisle without side chapels, and on the eastern side of each of the transepts a small square chapel, one of which still remains. This plan tallies to some extent with that of the cathedral at Leon (with which the detail of Burgos may well be compared), and is in some respects similar to that of the French cathedrals of Amiens, Clermont, and some other places. In fact, the planning of this chevet is one of the proofs that the work was of French, and not of Spanish origin. At the east end of the cathedral is a grand chapel, erected about A.D. 1487, by the Constable D. Pedro Fernandez de Velasco and his wife. This remarkable building was designed by an architect whose work we shall see again, and of whom it may be as well at once to say a few words. Juan de Colonia--a German by birth or origin, as his name shows--is said to have been brought to Burgos by Bishop Alfonso de Cartagena (A.D. 1435 to A.D. 1456) when he returned from the Council of Basle. There is evidence that he built the chapel of the great Carthusian monastery of Miraflores, on the hill just outside the town; and there is, I believe, but little doubt that he wrought here too. His work is very peculiar. It is essentially German in its endless intricacy and delicacy of detail, but has features which I do not remember to have seen in Germany, and which may fairly be attributed either to the Spaniards who worked under him, or to an attempt on his own part to accommodate his work to Spanish tastes.