Hochreith (also known as Hochreit), located in southern Lower Austria, was the summer residence of the Wittgenstein family. The estate includes a masonry hunting lodge (sometimes called a hunting castle), a red timber house, and several outbuildings in the surrounding area. The estate was furnished by the Wiener Werkstätte (Josef Hoffmann).

In the nearby village of Hohenberg (Ludwig Wittgenstein’s letters bear the header “Hochreit, Post Hohenberg, Lower Austria”), the Wittgenstein forestry administration still exists today, including an administrative building and a staff residence, both also designed by Hoffmann.

In the nearby town of St. Aegyd, where Karl Wittgenstein owned steelworks, a small Protestant church (the “Waldkirchlein” or “Forest Chapel”) still stands today. This church was donated by Karl Wittgenstein and built by Hoffmann.

Sources:

Monk, R. (1991). Ludwig Wittgenstein: The Duty of Genius. Vintage.

Leinfellner, E., Windholz, S. (2005). Ludwig Wittgenstein. Ein Volksschullehrer in Niederösterreich. Sutton Verlag

https://www.filmchronisten.at/filme/hoffmann-und-wittgenstein

Personal research and correspondence with the municipal office of Rohr im Gebirge.