On the north-east wall of the chapel is an altarpiece with wings by Wolgemut--SS. Wenceslaus and Martin, and SS. Barbara and Elizabeth on the reverse. The carved figures in the centre of the altarpiece on the south-east wall are by Veit Stoss, and the wings are of the school of Wolgemut. On the south wall are two pictures by Burgkmair (?) and a relief after designs by Adam Krafft. On the west wall are a picture by Kulmbach and a remarkable relief by Krafft, and on the north wall two pictures by Strigel, and one by Holbein the elder. The quadrangular aperture,[27] which occupies the entire space between the four pillars and allows a full view of the lower chapel, was for a long time walled up. This was done after the chapel had been plastered over, probably towards the end of the fifteenth century. Ably restored in 1892 the chapel is now very much in its original state. The plaster, repeated layers of which had covered the capitals and ornaments with a thick crust, preventing their shape from being any longer recognisable, has been removed. The missing parts of the ornaments have been very skilfully replaced. The original red stone flooring was laid bare and the aperture reopened. There is some disagreement as to the purpose of this opening. We are usually told that it was made for a united church service of the Emperor and Castle retainers: the Emperor taking his seat in the upper, the retainers in the lower chapel. It may be so: but one would rather believe that it was intended to enable the Castle dignitaries, when the service was held in the upper chapel, still to obtain a view of the niches where the mortal remains of their ancestors rested, and to reflect upon the virtues and the end of their mighty dead, remembering the while that they too were mortal. * * * * * On leaving the Castle we find ourselves in the Burgstrasse, called in the old days Unter der Veste, which was probably the High Street of the old town. Off both sides of this street and of the Bergstrasse ran narrow crooked little alleys lined with wooden houses of which time and fire have left scarcely any trace.