In a charter confirming her privileges Ruprecht granted to Nuremberg the care of the Reichsburg at all times, and made the town independent of the Burggraf in the time of feud,--excused them, that is, from assisting him in his little wars. Nuremberg gave Ruprecht active support in the proceedings against Wenzel; her chief exploit being the capture of Rothenburg after a siege of five weeks. When Ruprecht died (1410) Jobst and Sigismund were competitors for the Kaisership, Wenzel too striking in with claims for reinstatement. _Both_ the former were elected, so that Germany rejoiced in as many Kaisers as Christianity had Popes. Happily Jobst died in three months, and Sigismund, chiefly through the faithful and unwearied diligence of Burggraf Frederick VI. of Nuremberg, became Kaiser, "an always hoping, never resting, unsuccessful, vain and empty Kaiser. Specious, speculative, given to eloquence, diplomacy, and the windy instead of the solid arts: always short of money for one thing." This last fault affected Nuremberg in more than one way. In the first place it necessitated the borrowing of heavy loans from her. Throughout the fourteenth century and onwards the Kaisers asked and received very large loans (pleasantly so-called) from Nuremberg. Wenzel, Ruprecht and Sigismund demanded ever larger and increasingly frequent donations. Sometimes, but not very often, the citizens were rewarded by the concession of a charter or the ratification of some procedure on their part. But the price was, of course, out of all proportion to the value of the thing purchased. As an example of these dealings we may instance the "loan" exacted by Sigismund in 1430, which amounted to 9000 gulden, besides other requisitions in the same year. One sees, at any rate, that Nuremberg must have been sufficiently full-blooded to endure being bled in this manner. But it was this same impecuniosity on the part of the Kaiser which led him to sell outright, for a total sum of 400,000 gulden, the Electorate of Brandenburg, with its land, titles and sovereign electorship and all to Burggraf Frederick, who already held it in pawn. This step was, in its immediate results at least, distinctly advantageous to Nuremberg. Clever and energetic, the Burggraf set about suppressing the robber-knights and establishing order.