The Duchy of Saxony was partitioned in a process started in 1269 , nine years after in 1260 Albert II and John I had succeeded their father Albert I of Saxony .
Head entity: albert ii Q661181 18 19
Tail entity: albert i of saxony Q674931 27 28 29 30
Relation (head \u2192 tail): P40
Inverse relation (tail \u2192 head): P22