Saxon Eastern March in the context of "Sorbs"

The Margravate or Margraviate of Meissen (German: Markgrafschaft Meißen) was a medieval principality in the area of the modern German state of Saxony. It originally was a frontier march of the Holy Roman Empire, created out of the vast Marca Geronis (Saxon Eastern March) in 965. Under the rule of the Wettin dynasty, the margravate finally merged with the former Duchy of Saxe-Wittenberg into the Saxon Electorate by 1423.

The House of Wettin (German: Haus Wettin) is a dynasty which included Saxon kings, prince-electors, dukes, and counts, who once ruled territories in the present-day German federated states of Saxony, Saxony-Anhalt and Thuringia. The dynasty is one of the oldest in Europe, and its origins can be traced back to the town of Wettin, Saxony-Anhalt. The Wettins gradually rose to power within the Holy Roman Empire. Members of the family became the rulers of several medieval states, starting with the Saxon Eastern March in 1030. Other states they gained were Meissen in 1089, Thuringia in 1263, and Saxony in 1423. These areas cover large parts of Central Germany as a cultural area of Germany.

The family divided into two ruling branches in 1485 by the Treaty of Leipzig: the Ernestine and Albertine branches. The older Ernestine branch played a key role during the Protestant Reformation. Many ruling monarchs outside Germany were later tied to its cadet branch, the House of Saxe-Coburg and Gotha. The Albertine branch, while less prominent, ruled most of Saxony and played a part in Polish history.

The Marca Geronis or March of Gero was a vast super-march in the middle of the tenth century. It was probably created for Thietmar in the 920s and passed consecutively to his two sons, Siegfried and Gero. On Gero's death in 965 it was divided into five different marches: the Nordmark, Ostmark, Meissen, Zeitz, and Merseburg.

Because Siegfried's and Gero's comital seat was Merseburg, it has sometimes been called the March of Merseburg. However, there is also a Merseburger march which grew out of it after 965. Because the central diocese in his march was Magdeburg, it is sometimes called the March of Magdeburg. Other historians prefer to call it the Saxon Eastern March or Ostmark, but these terms are also applied to another march which grew out of it in 965. Because the Marca Geronis was created simultaneously with the March of Billung to the north, it is sometimes said to be the southern half of the Ostmark. Some historians even call it the "March of Meissen." Within the span of one page, James Westfall Thompson refers to it as both the "Sorben Mark" and the "Thuringian March".

The Northern March or North March (German: Nordmark, pronounced [ˈnɔʁtˌmaʁk] ) was created out of the division of the vast Marca Geronis in 965. It initially comprised the northern third of the Marca (roughly corresponding to the modern state of Brandenburg) and was part of the territorial organisation of areas conquered from the Wends. A Lutician rebellion in 983 reversed German control over the region until the establishment of the March of Brandenburg by Albert the Bear in the 12th century.

The Bishopric of Merseburg was an episcopal see on the eastern border of the medieval Duchy of Saxony with its centre in Merseburg, where Merseburg Cathedral was constructed. The see was founded in 967 by Emperor Otto I at the same time in the same manner as those of Meissen and Zeitz (from 1029: Naumburg), all suffragan dioceses of the Archbishopric of Magdeburg as part of a plan to bind the adjacent Slavic ("Wendish") lands in the Saxon Eastern March beyond the Saale River more closely to the Holy Roman Empire.

The prince-bishopric was re-established by King Henry II of Germany in 1004. It then covered a considerable small territory stretching from the Saale up to the Mulde River and the Margraviate of Meissen in the east.