Petřvald is a town in the Karviná District in the Moravian-Silesian Region of the Czech Republic. It has a population of around 7,200. It lies in the historical region of Cieszyn Silesia.
Wikipedia https://en.wikipedia.org/wiki/Petřvald_(Karviná_District)
Coordinates 49°49'51.846" N 18°23'23.401" E
