The article analyzes consecutive diplomatic and military steps undertaken by Casimir the Great towards Silesia. It analyzes the attitude towards the dukes of Opole, who did not occupy any particular place in that policy, ...

The primary framework of the organization of archpresbyterates in the Duchy of Opole was formed at the cusp of the 13th and 14th centuries and was based on the organization whose roots could be traced back to the first ...