After the Lateran council of March/April 1102, on 12 May 1102 Berengar was granted the privilege of founding the St Peter monastery in Kastl according to the Hirsauer reform.

Berengar co-founded the abbey with Count Friedrich of Kastl-Habsberg and his son Otto.

Diepold III of Cham-Vohburg also assisted with the foundation.
After the Lateran council of March/April 1102, on 12 May 1102 Berengar was granted the privilege of founding the St Peter monastery in Kastl according to the Hirsauer reform.
Berengar co-founded the abbey with Count Friedrich of Kastl-Habsberg and his son Otto.
Diepold III of Cham-Vohburg also assisted with the foundation.
Berengar II of Sulzbach