BRANDENBURG, the name of a margraviate and electorate which played an important part in German history, and afterwards grew into the kingdom of Prussia.
When Gero died in 965, his mark was divided into two parts, the northern portion, lying along both banks of the middle Elbe, being called the north or old mark, and forming the nucleus of the later margraviate of Brandenburg.
Electoral dignity, together with the southern part of the margraviate, which centred around Stendal, and Otto's son, John III., the northern or Saltzwedel portion.
He was gladly received by the king of Poland, and other neighbouring princes, welcomed by a large number of the people, and in 1348 invested with the margraviate by King Charles IV., who eagerly seized this opportunity to deal a blow at his enemy.
Took advantage of a family quarrel over the possessions of Louis the elder, who died in 1361, to obtain a promise from Louis the younger and Otto, that the margraviate should come to his own son, Wenceslaus, in case the electors died childless.