Twardogóra (pronounced Tfardo-goorah [tfardɔˈɡura], German: Festenberg) is a historic town in Oleśnica County, Lower Silesian Voivodeship, in south-western Poland.

It was inhabited by Poles, descendants of the Silesians tribe, and from the 12th century also settlers from other countries, especially from the German states, came to Twardogóra.

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.

At that time, duke John, from the Czech noble Podiebrad family, introduced Lutheranism in 1538.

Henryk Piirschel founded a mechanical weaving factory in 1852, and Henry Lichtenberg began industrial furniture production.

The town had, among other things, an agricultural and general school, two cinemas, a hospital, a child's home and extensive gastronomy.

As a result of Nazi Germany's defeat in World War II, the town was transferred to Poland in accordance with the Potsdam Agreement.