シロンスク・ピャスト家
The Duchy of Brzeg () or Duchy of Brieg (), () was one of the Duchies of Silesia, created in 1311 during the fragmentation of the Duchy of Wrocław. A Bohemian fief from 1329, it was ruled by the Silesian Piasts until their extinction in 1675. Its capital was Brzeg in Lower Silesia.