Obersachsen
The co-ruling Saxon dukes Albert II and his nephews Albert III, Eric I and John II partitioned Saxony into Saxe-Lauenburg and Saxe-Wittenberg before 20 September 1296. Bleckede was then a part of Saxe-Lauenburg, colloquially also called "Lower Saxony", as opposed to "Upper Saxony" for Saxe-Wittenberg.