frederick iii, burgrave of nuremberg, married the daughter of the last burgrave of nuremberg, sophie von raabs, in 1191. the male line of the raabs had died out. he was given the office of burgrave of nuremberg in 1192 by emperor henry vi. he then called himself "frederick the first burgrave of nuremberg". in the 13th century, a separate branch of the house in franconia had established itself through the loan with the burgraviate of nuremberg. the franconian margraves, along with the margraves and electors of brandenburg descended from this burgurgical line of zollerns.