Brest Castle was evolving in the course of several centuries from the Slavonic fortified settlement Berestye that had appeared at the turn of the 10th and 11th centuries at the confluence of the Mukhavets River into the Bug River, amid islands, formed by the rivers. It was re-built several times after numerous fires and sieges, was destroyed in the course of construction of the Brest Fortress in the 19th century.