down in 1420, rebuilt in 1428, and called the Walpurgiskapelle. These constituted the Burggräfliche Burg--the Burggraf's Castle. The rest of the castle was built on by Friedrich der Rotbart (Barbarossa), and called the Kaiserliche Burg. The old Five-cornered tower and the surrounding ground was the private property of the Burggraf, and he was appointed by the Emperor as imperial officer of the Kaiserliche Burg. Whether the Emperors claimed any rights of personal property over Nuremberg or merely treated it, at first, as imperial property, it is difficult to determine. The castle at any rate was probably built to secure whatever rights were claimed, and to serve generally as an imperial stronghold. An imperial representative, as we have seen, took up his residence there.[2] Gradually round the castle grew up the straggling streets of Nuremberg. Settlers built beneath the shadow of the Burg. The very names of the streets suggest the vicinity of a camp or fortress. Söldnerstrasse, Schmiedstrasse, and so forth, betray the military origin of the present busy commercial town. From one cause or another a mixture of races, of Germanic and non-Germanic, of Slavonic and Frankish elements, seems to have occurred amongst the inhabitants of the growing village, producing a special blend which in dialect, in customs, and in dress was soon noticed by the neighbours as unique, and stamping the art and development of Nuremberg with that peculiar character which has never left it. Various causes combined to promote the growth of the place. The temporary removal of the Mart from Fürth to Nuremberg under Henry III. doubtless gave a great impetus to the development of the latter town. Henry IV., indeed, gave back the rights of Mart, customs and coinage to Fürth. But it seems probable that these rights were not taken away again from Nuremberg. The possession of a Mart was, of course, of great importance to a town in those days, promoting industries and arts and settled occupations. The Nurembergers were ready to suck out the fullest advantage from their privilege. That mixture of races, to which we have referred, resulted in remarkable business energy--energy which soon found scope in the conduct of the business which the natural position of Nuremberg on the South and North, the East and Western trade routes, brought to her. It was not very long before she became the centre of the vast trade between the Levant and Western Europe, and the chief emporium for the produce of Italy--the _Handelsmetropole_ in fact of South Germany.