Breg is not only a common toponym in Slovenia, but also has equivalents in other Slavic languages (e.g., Brijeg in Bosnia and Herzegovina, Břehy in the Czech Republic, Brehy in Slovakia, and Brzeg in Poland), all derived from the Slavic common noun *bergъ 'slope, bank'.
It was from Brieg garrison, the German Cavalry Captain (Rittmeister) Konrad Freiherr von Wangenheim became famous for securing a Gold medal win at the 1936 Summer Olympics in Berlin for the German equestrian team whilst suffering with a broken collarbone.
He was the first child of Gottlieb Ringeltaube, Vicar of Scheidelwitz (today Szydlowice), near Brzeg, in Silesia.
Duke George II died on 7 May 1586 and his two sons inherited only Oława-Wołów as co-rulers, because he left Brzeg to his widow Barbara as her Oprawa wdowia.
From all the Legnica-Brzeg lands, August could retain only two districts: Przeworno and Kantorowice near Brzeg.
While a student he officiated during the holy days at Brieg, Silesia (1857), and at Stockholm, Sweden (1858).
1413–1436 Louis II, grandson of Louis I the Fair, also Duke of Brzeg since 1399
In the 1550s, together with his father and Dominicus, Pahr contributed to building the Silesian Brzeg Castle of Brzeg and supervised the construction of fortifications at Rostock and Schwerin.
A few months later, Duke Louis I give his grandson the half of the rents of the towns of Brzeg, Wierzbno and Oława.
Joachim Frederick of Brieg (1550–1602), Duke of Oława, Wołów, Brzeg, and Legnica
In 1328, John supported the inhabitants of Brzeg-Legnica in the fight against Bolesław III the Generous and Henry VI the Good; however, this war caused significant areas of devastation outside Lower Silesia.
Prominent examples include: the castle at Płakowice (16th century), the castle at Brzeg, (rebuilt from a Gothic stronghold in 1544–60), the castle at Niepołomice (rebuilt after a fire in 1550–71), the castle at Baranów Sandomierski (built in 1591–1606 by Santi Gucci), and the castle at Krasiczyn.