At Siebensterngasse 30 lived the photographer Moriz Nähr (1859–1945), who took several well-known portraits of Ludwig Wittgenstein. Nähr also created notable photographs of Gustav Klimt and Gustav Mahler.

Source: Janik, A.S., & Veigl, H. (1998). Wittgenstein in Wien. Ein biographischer Streifzug durch die Stadt und ihre Geschichte. Springer.

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The exhibition "Scientific World-Conception in Vienna – Places of the Vienna Circle" at the Vienna Library in City Hall (5 June to 19 September 2025) presented the ideas and meeting places of the Vienna Circle in their scientific, social, and political context. The influential circle around Moritz Schlick first appeared in public in 1929, shaped the cultural life of “Red Vienna,” and was almost entirely driven into exile after 1938.

At these meetings, Wittgenstein’s Tractatus was also discussed in depth. Wittgenstein himself declined invitations to attend the meetings, but met with Schlick and Waismann in smaller groups.

By the way, one of the last paternoster lifts is still in operation in Vienna’s City Hall.

External link: Vienna Library in City Hall

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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:

• Eigner, P. (2023). Die Wittgensteins: Geschichte einer unglaublich reichen Familie. Molden.
• Leinfellner, E., Windholz, S. (2005). Ludwig Wittgenstein. A primary school teacher in Lower Austria. Sutton.
• Monk, R. (1991). Ludwig Wittgenstein: The Duty of Genius. Vintage.
• Wittgenstein, H. (2015). Familienerinnerungen (I. Somavilla, Ed.). Haymon Verlag.
• https://www.filmchronisten.at/filme/hoffmann-und-wittgenstein
• Personal research and correspondence with the municipal office of Rohr im Gebirge.

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Here is a translation into British English: At Lange Gasse 72, Florianigasse 42 and Währingerstraße 33–35 in Vienna, memorial plaques commemorate the mathematician Kurt Gödel, who lived at these addresses between 1927 and 1929 and took part in meetings of the Vienna Circle. There are indications of a mutual reception between Gödel and Wittgenstein, who also examined the philosophical foundations of mathematics. However, there is no evidence that the two ever met in person.

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

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In a bookshop on Trinity Street in Cambridge, John Maynard Keynes is commemorated, a contemporary and companion of Ludwig Wittgenstein. When Wittgenstein returned to Cambridge in 1929 after a long absence, Keynes wrote in a letter: "Well, God has arrived. I met him on the 5.15 train“ (Monk, 1991, p. 255).

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

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George Edward Moore was the predecessor of Ludwig Wittgenstein in the Chair of Philosophy at Trinity College, Cambridge, a position Wittgenstein assumed in 1939. In 1929, Moore, together with Bertrand Russell, acted as an examiner during the defence of Wittgenstein’s doctoral thesis (Tractatus). Their graves lie only a few metres apart in the Ascension Parish Burial Ground in Cambridge.

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

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In the summer of 1929, following the completion of his doctorate, Ludwig Wittgenstein spent some time living at Frostlake Cottage on Malting Lane in Cambridge (Monk, 1991).

External link: Capturing Cambridge / Malting House

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Wittgenstein House, 1030 Vienna, Kundmanngasse and Parkgasse.

Built between 1926/27 and 1928/29 (the dates vary) according to plans by Paul Engelmann and Ludwig Wittgenstein for his sister Margaret Stonborough.

External links:

• Wittgenstein House
• Geschichte Wiki Wien: Villa Wittgenstein

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