Postcard CZ-2004133

Castle in Frýdlant - north of the Czech Republic.

The original medieval castle, extended in the 16th century to a Renaissance chateau, became the property of the famous Thirty Years War commander, Albrecht von Wallenstein in 1622. He turned it into the center of his extensive Frýdlant duchy. The last noble owners were the Clam-Gallas, who opened the castle already in 1801 to the public; Frýdlant, therefore, became the oldest castle museum in Central Europe.

Info from here: https://www.zamek-frydlant.cz/en