Racibórz

Racibórz was an Upper Silesian duchy centred on Racibórz and held as a Bohemian fief. In 1337 Nicholas II of Opava, a Přemyslid, ruled it together with Opava after Duke Leszek died without an heir.

The duchies separated in 1377, but Racibórz remained with the Opava Přemyslids until Jan II the Good united it with Opole in 1521. On his death in 1532 it reverted to the Bohemian crown under the Habsburgs and was pledged to the Hohenzollerns of Brandenburg-Ansbach. The 1742 Treaty of Breslau assigned it to Prussia.