Heidenreichstein
is a municipality with 4010 inhabitants (as of 1 January 2018) in the district Gmünd in the northwestern Waldviertel in Lower Austria.
Heidenreichstein owes its name to one of the first burgraves, called Heidenreich. The privately owned and still inhabited Heidenreichstein Castle is a moated castle and is considered a landmark of Heidenreichstein. The market, like the castle, was probably built in the last decades of the 12th century. In 1369, the place was called a market with its own seal.
