 Although Polish, the town was first mentioned as "Vestenberg" in 1293.From the beginning of the 14th century, Twardogóra was part of the Duchy of Oleśnica, which remained under the rule of the Polish Piast dynasty until 1492, although as a fief of the Kingdom of Bohemia.Residents of the city remembered the unpleasant experiences of the Hussite Wars in the late 15th century building a defensive structure.