In 1123 Adalbert 's son Otto the Rich together with his son Albert the Bear , who would become the first ruler of Brandenburg , established a Benedictine monastery at the site .
Head entity: albert the bear Q156041 12 13 14
Tail entity: otto the rich Q695735 5 6 7
Relation (head \u2192 tail): P22
Inverse relation (tail \u2192 head): P40